GoPro (GPRO) 10-K 20 Feb 15 2014 FY Annual report Financial data

Document_and_Entity_Informatio

Document and Entity Information (USD $)	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2014	Jun. 30, 2014
Document Information [Line Items]
Entity Registrant Name	GoPro, Inc.
Entity Central Index Key	1500435
Current Fiscal Year End Date	-19
Entity Filer Category	Non-accelerated Filer
Document Type	10-K
Document Period End Date	31-Dec-14
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	FY
Amendment Flag	FALSE
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float		$2,127,600
Common Class A [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding	52,091,317
Common Class B [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding	77,023,371

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Current assets:
Cash and cash equivalents	$319,929	$101,410
Marketable securities	102,327	0
Accounts receivable, net of allowance for doubtful accounts of $1,250 and $520 at December 31, 2014 and 2013, respectively	183,992	122,669
Inventories, net	153,026	111,994
Prepaid expenses and other current assets	63,769	21,967
Total current assets	823,043	358,040
Property and equipment, net	41,556	32,111
Intangible assets and goodwill	17,032	17,365
Other long-term assets	36,060	32,155
Total assets	917,691	439,671
Current liabilities:
Accounts payable	126,240	126,423
Accrued liabilities	115,775	86,391
Deferred revenue	14,022	7,781
Income taxes payable	2,732	19,702
Current portion of long-term debt	0	60,297
Total current liabilities	258,769	300,594
Long-term debt, less current portion	0	53,315
Other long-term liabilities	17,718	13,930
Total liabilities	276,487	367,839
Commitments, contingencies and guarantees (Note 12)
Redeemable convertible preferred stock—$0.0001 par value; no and 36,000,000 shares authorized as of December 31, 2014 and 2013, respectively; no and 30,523,036 shares issued and outstanding as of December 31, 2014 and 2013, respectively; liquidation preference of $0 and $77,326 as of December 31, 2014 and 2013, respectively	0	77,198
Stockholders’ equity (deficit)
Preferred stock—$0.0001 par value; 5,000,000 and no shares authorized as of December 31, 2014 and 2013, respectively; no shares issued and outstanding as of December 31, 2014	0	0
Common stock and additional paid-in capital—$0.0001 par value; 500,000,000 and no Class A shares authorized as of December 31, 2014 and 2013, respectively; 52,091,317 shares issued and outstanding as of December 31, 2014; 150,000,000 Class B shares authorized as of December 31, 2014 and 2013; 77,023,371 and 81,420,040 shares issued and outstanding as of December 31, 2014 and 2013, respectively	533,000	14,518
Retained earnings (accumulated deficit)	108,204	-19,884
Total stockholders’ equity (deficit)	641,204	-5,366
Total liabilities, redeemable convertible preferred stock and stockholders’ equity (deficit)	$917,691	$439,671

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, except Share data, unless otherwise specified
Accounts receivable, allowance for doubtful accounts	$1,250	$520
Redeemable convertible preferred stock, par value ( in dollars per share)	$0.00	$0.00
Redeemable convertible preferred stock, shares authorized	0	36,000,000
Redeemable convertible preferred stock, shares issued	0	30,523,036
Redeemable convertible preferred stock, shares outstanding	0	30,523,036
Liquidation preference	$0	$77,326
Preferred stock, par value (in dollars per share)	$0.00	$0.00
Preferred stock, shares authorized	5,000,000	0
Preferred stock, shares issued	0
Preferred stock, shares outstanding	0
Common stock, shares authorized		150,000,000
Common stock, shares issued		81,420,040
Common stock, shares outstanding		81,420,040
Common Class A [Member]
Common stock, par value (in dollars per share)	$0.00	$0.00
Common stock, shares authorized	500,000,000	0
Common stock, shares issued	52,091,317
Common stock, shares outstanding	52,091,317
Common Class B [Member]
Common stock, par value (in dollars per share)	$0.00	$0.00
Common stock, shares authorized	150,000,000	150,000,000
Common stock, shares issued	77,023,371	81,420,040
Common stock, shares outstanding	77,023,371	81,420,040

Consolidated_Statements_of_Ope

Consolidated Statements of Operations (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Statement [Abstract]
Revenue	$1,394,205	$985,737	$526,016
Cost of revenue	766,970	623,953	298,530
Gross profit	627,235	361,784	227,486
Operating expenses:
Research and development	151,852	73,737	36,115
Sales and marketing	194,377	157,771	116,855
General and administrative	93,971	31,573	20,899
Total operating expenses	440,200	263,081	173,869
Operating income	187,035	98,703	53,617
Other expense, net	-6,060	-7,374	-407
Income before income taxes	180,975	91,329	53,210
Income tax expense	52,887	30,751	20,948
Net income	128,088	60,578	32,262
Less: distributed earnings	0	0	112,209
Less: undistributed earnings allocable to participating securities	-16,512	-16,727	0
Undistributed net income (loss) attributable to common stockholders—basic	111,576	43,851	-79,947
Add: adjustments to net income for dilutive securities allocable to: holders of preferred stock and unvested early exercised options and restricted stock	2,277	2,309	0
Undistributed net income (loss) attributable to common stockholders—diluted	113,853	46,160	-79,947
Distributed earnings to common stockholders	$0	$0	$84,828
Weighted-average shares used to compute net income per share attributable to common stockholders:
Basic (in shares)	104,453	81,018	74,226
Diluted (in shares)	123,630	98,941	74,226
Net income per share attributable to common stockholders:
Basic (in dollars per share)	$1.07	$0.54	$0.07
Diluted (in dollars per share)	$0.92	$0.47	$0.07

Consolidated_Statements_of_Red

Consolidated Statements of Redeemable Convertible Preferred Stock and Shareholders' Equity (Deficit) (USD $)	Total	Redeemable Convertible Preferred Stock [Member]	Common Stock and Additional Paid-in Capital [Member]	Retained Earnings (Accumulated Deficit) [Member]
In Thousands, except Share data, unless otherwise specified
Beginning Balance, Temporary equity at Dec. 31, 2011		$91,146
Beginning Balance at Dec. 31, 2011	-24,095		6,901	-30,996
Beginning Balance, Shares at Dec. 31, 2011			73,806,000
Beginning Balance, Temporary equity, Shares at Dec. 31, 2011		34,734,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Preferred stock dividend accretion	-4,207	4,207	-4,207
Exercise of stock options (shares)	2,486,000		2,697,000
Exercise of stock options and vesting of restricted stock and early exercise stock options	2,107		2,107
Excess tax benefit from stock-based compensation	4,182		4,182
Stock-based compensation expense	9,156		9,156
Conversion of preferred stock to common stock, net of issuance cost accretion, Shares		-4,211,000	4,211,000
Conversion of preferred stock to common stock, net of issuance cost accretion	11,502	-11,502	11,502
Cash distribution to stockholders	-110,648	-6,713	29,162	-81,486
Net income	32,262			32,262
Increase (Decrease) in Temporary Equity [Roll Forward]
Preferred stock dividend accretion	-4,207	4,207	-4,207
Conversion of preferred stock to common stock	11,502	-11,502	11,502
Ending Balance, Temporary equity at Dec. 31, 2012		77,138
Ending Balance at Dec. 31, 2012	-79,741		479	-80,220
Ending Balance, Shares at Dec. 31, 2012			80,714,000
Ending Balance, Temporary equity, Shares at Dec. 31, 2012		30,523,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Preferred stock dividend accretion	0
Exercise of stock options (shares)	345,000		613,000
Exercise of stock options and vesting of restricted stock and early exercise stock options	1,148		1,148
Excess tax benefit from stock-based compensation	323		323
Stock-based compensation expense	10,887		10,887
Net income	60,578			60,578
Accretion of preferred stock issuance costs	-60	60	-60
Retirement of common stock, Shares			-15,000
Retirement of common stock	-242		0	-242
Issuance of common stock for acquisition, Shares			108,000
Issuance of common stock for acquisition	1,741		1,741
Increase (Decrease) in Temporary Equity [Roll Forward]
Preferred stock dividend accretion	0
Accretion of preferred stock issuance costs	-60	60	-60
Ending Balance, Temporary equity at Dec. 31, 2013	77,198	77,198
Ending Balance at Dec. 31, 2013	-5,366		14,518	-19,884
Ending Balance, Shares at Dec. 31, 2013			81,420,000
Ending Balance, Temporary equity, Shares at Dec. 31, 2013	30,523,036	30,523,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Preferred stock dividend accretion	0
Exercise of stock options (shares)	6,419,000		6,889,000
Exercise of stock options and vesting of restricted stock and early exercise stock options	8,241		8,241
Excess tax benefit from stock-based compensation	77,134		77,134
Stock-based compensation expense	71,399		71,399
Conversion of preferred stock to common stock, net of issuance cost accretion, Shares		-30,523,000	30,523,000
Conversion of preferred stock to common stock, net of issuance cost accretion	77,198	-77,198	77,198
Net income	128,088			128,088
Retirement of common stock, Shares			-1,430,000
Retirement of common stock	-1,177		-1,177
Issuance of common stock upon public offerings, net of offering costs, Shares			10,188,000
Issuance of common stock upon public offerings, net of offering costs	286,247		286,247
Issuance of common stock upon release of RSUs, net of shares withheld for tax, Shares			1,525,000
Issuance of common stock upon release of RSUs, net of shares withheld for tax	-560		-560
Increase (Decrease) in Temporary Equity [Roll Forward]
Preferred stock dividend accretion	0
Conversion of preferred stock to common stock	77,198	-77,198	77,198
Ending Balance, Temporary equity at Dec. 31, 2014	0	0
Ending Balance at Dec. 31, 2014	$641,204		$533,000	$108,204
Ending Balance, Shares at Dec. 31, 2014			129,115,000
Ending Balance, Temporary equity, Shares at Dec. 31, 2014	0	0

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Operating activities:
Net income	$128,088	$60,578	$32,262
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation and amortization	17,945	12,034	3,975
Deferred taxes	-16,920	-8,129	-2,121
Excess tax benefit from stock-based compensation	-77,134	-323	-4,182
Stock-based compensation	71,399	10,887	9,156
Provision for doubtful accounts	971	664	736
Provision for inventory obsolescence	4,075	4,081	1,955
Amortization and write-off debt discount and issuance costs	1,806	561	21
Other	59	663	36
Changes in operating assets and liabilities:
Accounts receivable	-62,294	-43,117	-53,508
Inventories	-45,108	-55,664	-43,718
Prepaid expenses and other assets	-30,317	-15,355	-8,510
Accounts payable and accrued liabilities	98,354	135,197	67,802
Deferred revenue	5,998	400	4,462
Net cash provided by operating activities	96,922	102,477	8,366
Investing activities:
Purchases of property and equipment	-27,498	-18,325	-17,795
Purchases of marketable securities	-103,827	0	0
Maturities of marketable securities	1,083	0	0
Proceeds from sale of property and equipment	288	0	0
Payments made in connection with business acquisitions, net	-3,950	-2,912	0
Net cash used in investing activities	-133,904	-21,237	-17,795
Financing activities:
Net proceeds from public offerings of common stock	293,969	0	0
Proceeds from issuance of common stock on exercised options	7,608	527	2,762
Payment of debt issuance costs and deferred public offering costs	-5,730	-1,165	-1,776
Excess tax benefit from stock-based compensation	77,134	323	4,182
Purchase of shares and net exercise of stock options	-920	0	0
Taxes paid related to net share settlement of equity awards	-560	0	0
Payment of indemnification holdback on acquired company	-2,000	0	0
Proceeds from issuance of debt and revolving credit facility	0	30,000	139,389
Repayment of debt	-114,000	-46,000	-10,380
Cash distribution to stockholders	0	0	-117,361
Net cash provided by (used for) financing activities	255,501	-16,315	16,816
Net increase in cash and cash equivalents	218,519	64,925	7,387
Cash and cash equivalents, beginning of year	101,410	36,485	29,098
Cash and cash equivalents, end of year	319,929	101,410	36,485
Supplementary cash flow disclosure:
Cash paid for Interest	1,853	4,904	284
Cash paid for income taxes	37,283	2,831	31,317
Non-cash investing and financing activities:
Preferred stock dividend accretion	0	0	4,207
Conversion of preferred stock to common stock, net of issuance cost accretion	77,198	0	11,502
Purchases of property and equipment included in accounts payable and accrued liabilities	2,474	2,937	4,621
Reclass of deferred public offering costs to additional paid-in capital	7,722	0	0
Deferred public offering costs not yet paid	$903	$490	$0

Business_overview

Business overview	12 Months Ended
	Dec. 31, 2014
Text Block [Abstract]
Business overview	Business overview
	GoPro, Inc. (GoPro or the Company) was incorporated as Woodman Labs, Inc. in California on February 14, 2004 as an S Corporation and reincorporated in Delaware in December 2011 as a C Corporation. The Company produces mountable and wearable cameras and accessories, which the Company refers to as capture devices. Additionally, GoPro develops and provides desktop editing software and mobile applications for free to consumers. The Company’s capture devices are sold globally through retailers, wholesale distributors and on the Company’s website. The Company has wholly-owned subsidiaries in Hong Kong, Germany and the Cayman Islands. GoPro’s corporate headquarters are located in San Mateo, California with additional operational support offices in Hong Kong, the Netherlands and Shenzhen, China.
	In July 2012, the Company’s board of directors (Board) approved a 3-for-1 split of the preferred stock and common stock. All share and per share amounts for all periods presented in these consolidated financial statements have been adjusted to reflect the stock split.
	The Company completed its initial public offering (IPO) of Class A common stock on July 1, 2014. The Company sold 8,900,000 shares and certain of its stockholders sold 11,570,000 shares, including 2,670,000 shares for the underwriters' option to purchase additional shares. The shares were sold at an initial public offering price of $24.00 per share for net proceeds of $200.8 million to the Company, after deducting underwriting discounts and commissions of $12.8 million. Offering costs incurred by the Company were approximately $6.2 million.
	The Company completed a follow-on offering of common stock in November 2014. The Company sold 1,287,533 shares of Class A common stock and certain of its stockholders sold 10,627,042 shares, including 1,554,075 shares for the underwriters' option to purchase additional shares. The shares were sold at an initial public offering price of $75.00 per share for net proceeds of $93.2 million to the Company, after deducting underwriting discounts and commissions of $3.4 million. Offering costs incurred by the Company were approximately $1.5 million.

Basis_of_presentation

Basis of presentation	12 Months Ended
	Dec. 31, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of presentation	Basis of presentation
	The Company’s fiscal year ends on December 31, and its fiscal quarters end on March 31, June 30 and September 30.
	Principles of consolidation
	These consolidated financial statements include all the accounts of the Company and its wholly-owned subsidiaries. Unless otherwise specified, references to the Company are references to the Company and its consolidated subsidiaries. All intercompany balances and transactions have been eliminated upon consolidation.
	Use of estimates
	The preparation of financial statements in accordance with accounting principles generally accepted in the United States of America (U.S. GAAP) requires management to make estimates and assumptions that affect the amounts reported and disclosed in the Company’s consolidated financial statements and accompanying notes. The Company bases its estimates and assumptions on historical experience and on various other factors that it believes to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. The actual results experienced by the Company may differ materially and adversely from management’s estimates. To the extent there are material differences between the estimates and the actual results, future results of operations will be affected.
	Comprehensive income
	For all periods presented, comprehensive income equaled net income. Therefore, the Consolidated Statements of Comprehensive Income have been omitted from the consolidated financial statements.

Summary_of_significant_account

Summary of significant accounting policies	12 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
Summary of significant accounting policies	Summary of significant accounting policies
	Cash equivalents
	Cash equivalents consist of short-term, highly liquid financial instruments with immaterial interest rate risk that are readily convertible to cash and have maturities of three months or less from the date of purchase. As of December 31, 2014, cash equivalents consisted of money market funds recorded at cost, which approximates fair value and a corporate debt security that was less than 90 days from maturity when acquired, recorded at amortized cost which approximates fair value.
	Marketable securities
	Marketable securities consist of commercial paper, U.S. treasury securities, U.S. agency securities, and corporate debt securities, and are classified as available-for-sale securities. As the Company views these securities as available to support current operations, it has classified all available-for-sale securities as short-term. Available-for-sale securities are carried at fair value with unrealized gains and losses, if any, reported as a component of accumulated other comprehensive income in stockholders' equity, while realized gains and losses and other-than-temporary impairments, if any, are reported as a component of net income. As of December 31, 2014, the Company's marketable securities were recorded at their amortized cost which approximates fair value. An impairment charge is recorded in the Consolidated Statements of Operations for declines in fair value below the cost of an individual investment that is deemed to be other than temporary. The Company assesses whether a decline in value is temporary based on the length of time that the fair market value has been below cost, the severity of the decline and the intent and ability to hold or sell the investment. The Company did not identify any marketable securities as other-than-temporarily impaired as of December 31, 2014.
	Accounts receivable and allowance for doubtful accounts
	Accounts receivables are stated at invoice value less estimated allowances for returns and doubtful accounts. The Company continually monitors customer payments and maintains a reserve for estimated losses resulting from its customers’ inability to make required payments. The Company considers factors such as historical experience, credit quality, age of the accounts receivable balances, geographic related risks and economic conditions that may affect a customer’s ability to pay. In cases where there are circumstances that may impair a specific customer’s ability to meet its financial obligations, a specific allowance is recorded against amounts due, and thereby reduces the net recognized receivable to the amount reasonably believed to be collectible. For all periods presented, the activity in the allowance for doubtful accounts was not material.
	Inventories
	Inventories consist of finished goods and component parts, which are purchased directly or from contract manufacturers. Inventories are stated at the lower of cost or market on a first-in, first-out basis. The Company’s assessment of market value requires the use of estimates regarding the net realizable value of its inventory balances, including an assessment of excess or obsolete inventories. The Company determines excess and obsolete inventories based on an estimate of the future demand for its products within a specified time horizon, generally 12 months. The estimates used for future demand are also used for near-term capacity planning and inventory purchases and are consistent with revenue forecast assumptions. If the Company’s demand forecast is greater than actual demand, the Company may be required to record an excess inventory charge, which would decrease gross profit. Any write-downs taken establish a new cost basis for the underlying inventory. For all periods presented, inventories were predominantly comprised of finished goods.
	Point of purchase (POP) displays
	The Company sponsors a program to provide retailers with POP displays in order to facilitate the marketing of the Company’s products within retail stores. The POP displays contain a video display that broadcast video images taken by GoPro cameras with product placement available on the POP display for cameras and accessories. The Company generally provides these POP displays to customers free of charge. The costs of the POP displays, less any fees charged to customers, are capitalized as a long-term asset on the accompanying Consolidated Balance Sheets, and the net cost is recognized over the expected period of the benefit provided by these assets, which generally ranges from 24 to 36 months.
	Property and equipment, net
	Property and equipment are stated at cost and are depreciated using the straight-line method over the estimated useful life of the assets, ranging from one to seven years. Leasehold improvements are stated at cost and amortized over the shorter of the lease term or the expected useful life of the improvements. Property and equipment pending installation, configuration or qualification are classified as construction in progress.
	Fair value measurements
	The Company categorizes the fair value of its financial assets according to the hierarchy established by the FASB, which prioritizes the inputs to valuation techniques used to measure fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurements) and the lowest priority to unobservable inputs (Level 3 measurements). The three levels of the fair value hierarchy are:
	Level 1	Valuations based on quoted prices in active markets for identical assets or liabilities that the Company has the ability to directly access.
	Level 2	Valuations based on quoted prices for similar assets or liabilities; valuations for interest-bearing securities based on non-daily quoted prices in active markets; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable data for substantially the full term of the assets or liabilities.
	Level 3	Valuations based on inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities.
	A financial instrument’s level within the fair value hierarchy is based on the lowest level of any input that is significant to the fair value measurement. In circumstances in which a quoted price in an active market for the identical liability is not available, the Company is required to use the quoted price of the identical liability when traded as an asset, quoted prices for similar liabilities, or quoted prices for similar liabilities when traded as assets. If these quoted prices are not available, the Company is required to use another valuation technique, such as an income approach or a market approach.
	Leases
	The Company leases its facilities under cancelable and non-cancelable operating leases. For leases that contain rent escalation or rent concession provisions, the Company records the total rent expense on a straight-line basis over the term of the lease. The Company records the difference between the rent paid and the straight-line rent as a deferred rent liability on the accompanying Consolidated Balance Sheets. Leasehold improvements are included in property and equipment, net.
	Goodwill, acquired intangible assets and other long-lived assets
	Goodwill represents the excess of the purchase price over the fair value of the net tangible and intangible assets acquired in a business combination. Goodwill is not amortized but the Company performs an annual qualitative assessment of its goodwill during the fourth quarter of each calendar year to determine if any events or circumstances exist, such as an adverse change in business climate or a decline in the overall industry demand, that would indicate that it would more likely than not reduce the fair value of a reporting unit below its carrying amount, including goodwill. If events or circumstances do not indicate that the fair value of a reporting unit is below its carrying amount, then goodwill is not considered to be impaired and no further testing is required. If further testing is required, the Company performs a two-step process. The first step involves comparing the fair value of the Company’s reporting unit to its carrying value, including goodwill. If the carrying value of the reporting unit exceeds its fair value, the second step of the test is performed by comparing the carrying value of the goodwill in the reporting unit to its implied fair value. An impairment charge is recognized for the excess of the carrying value of goodwill over its implied fair value. For the purpose of impairment testing, the Company has determined that it has one reporting unit. There has been no impairment of goodwill for any periods presented.
	The Company’s long-lived assets consist of property and equipment and acquired intangible assets. Acquired intangible assets with definite lives are amortized on a straight-line basis over the remaining estimated economic life of the underlying products and technologies. The Company reviews its definite-lived long-lived assets for impairment whenever events or changes in circumstances indicate that the carrying amount of a long-lived asset may not be recoverable. Recoverability of an asset group is measured by comparing its carrying amount to the expected future undiscounted cash flows that the asset group is expected to generate. If it is determined that an asset group is not recoverable, an impairment loss is recorded in the amount by which the carrying amount of the asset group exceeds its fair value. There has been no impairment of long-lived assets for any periods presented.
	Warranty
	The Company generally provides 12-month warranty coverage on all of its products except in the European Union where the Company provides a two-year warranty. The Company’s warranty provides for repair or replacement of the associated products during the warranty period. The Company establishes a liability for estimated product warranty costs at the time product revenue is recognized. The warranty obligation is affected by product failure rates and the related use of materials, labor costs and freight incurred in correcting any product failure. Should actual product failure rates, use of materials, or other costs differ from the Company’s estimates, additional warranty liabilities could be required, which would reduce its gross profit.
	Revenue recognition
	Revenue is primarily comprised of product revenue, net of returns and sales incentives.
	Revenue is primarily derived from the sale of capture devices, as well as the related implied post contract support (PCS). The Company recognizes revenue when persuasive evidence of an arrangement exists, delivery has occurred, the sales price is fixed or determinable and collectability is reasonably assured. Evidence of an arrangement consists of an order from its distributors, resellers or online customers. The Company considers delivery to have occurred once title and risk of loss has been transferred. Customer deposits are included in accrued liabilities on the accompanying Consolidated Balance Sheets and are recognized as revenue when all the criteria for recognition of revenue are met.
	The Company’s standard terms and conditions of sale for its non-web-based sales do not allow for product returns and it generally does not allow product returns other than under warranty. However, the Company grants limited rights to return product for certain large retailers and distributors. Estimates of expected future product returns are recognized at the time of sale based on analyses of historical return trends by customer class. Upon recognition, the Company reduces revenue and cost of sales for the estimated return. Return trends are influenced by product life cycle status, new product introductions, market acceptance of products, sales levels, product sell-through, the type of customer, seasonality, product quality issues, operational policies and procedures, and other factors. Return rates can fluctuate over time, but are sufficiently predictable to allow the Company to estimate expected future product returns.
	For customers who purchase products directly from the Company’s website, transfer of risk of loss is determined to be upon delivery to the customer’s address. The Company defers those sales made to customers who purchase products from its website during a fixed time frame prior to the end of the reporting period for which the Company estimates delivery to occur in the following period. The Company uses estimates to determine when shipments are delivered based on third-party metrics for average transit time. Additionally, the Company provides a 30-day money back guarantee for web-based sales for which the Company reduces revenue by an estimate of potential future product returns related to the web-based sales, based on analyses of historical return trends and seasonality. Estimates for web-based sale returns and estimates to derive web sale shipment delivery dates may differ from actual results.
	The Company’s camera products include multiple elements. Each element in a multiple element arrangement must be evaluated to determine whether it represents a separate unit of accounting. An element constitutes a separate unit of accounting when it has standalone value and delivery of an undelivered element is both probable and delivery is within the Company’s control.
	The Company has determined its multiple element arrangements generally include two separate units of accounting: The first element is the hardware component (camera and accessories) and the embedded firmware essential to the functionality of the camera delivered at the time of sale. The second element is the implied right for the customer to receive post contract support included with the purchase of the Company’s camera products. PCS includes the right to receive, on a when and if available basis, future unspecified firmware upgrades and features as well as bug fixes, email and telephone support.
	The Company accounts for each element separately and allocate fees from the arrangement based on the relative selling price of each element. Revenue allocated to an undelivered element is recognized over an estimated service period. The Company recognizes revenue for delivered elements only when all contractual obligations have been completed.
	The Company uses a hierarchy to determine the allocation of revenue. The hierarchy is as follows: (i) vendor-specific objective evidence of fair value (VSOE), (ii) third-party evidence of selling price (TPE) and (iii) best estimate of the selling price (BESP).
	i.	VSOE generally exists only when a company sells a deliverable separately and is the price actually charged by the company for that deliverable. The Company does not sell its deliverables separately and, as such, do not have VSOE.
	ii.	TPE can be substantiated by determining the price that other parties sell similar or substantially similar offerings. The Company does not believe that there is accessible TPE evidence for similar deliverables since there are not comparable deliverables sold by other companies.
	iii.	BESP reflects the Company’s best estimates of what the selling prices of elements would be if they were sold regularly on a stand-alone basis. The Company believes that BESP is the most appropriate methodology for determining the allocation of revenue for its multiple element arrangements.
	The Company has allocated revenue between its two elements using the relative selling price method which is based on the BESP for all deliverables. Revenue allocated to the delivered hardware and the related essential software is recognized at the time of sale provided the conditions for recognition of revenue have been met. Revenue allocated to PCS is deferred and recognized on a straight-line basis over the estimated term of the support period, which is estimated to be one year based on historical experience. As of December 31, 2014, and 2013, deferred implied PCS revenue was $11.6 million and $6.4 million, respectively.
	The Company’s process for determining the BESP for its deliverables involves multiple factors that may vary depending upon the unique facts and circumstances related to each deliverable. Key factors considered by the Company in developing the BESP for PCS include evaluating the level of support provided to customers and analyzing the amount of time and cost that is allocated to the Company’s efforts to develop the undelivered elements, determining the cost of its support efforts, and then adding an appropriate level of gross profit to these costs.
	Sales incentives
	The Company offers sales incentives through various programs, consisting primarily of cooperative advertising and marketing development fund programs. The Company records cooperative advertising and marketing development fund programs with customers as a reduction to revenue unless it receives an identifiable benefit in exchange for credits claimed by the customer and can reasonably estimate the fair value of the identifiable benefit received, in which case the Company will record it as a marketing expense. In addition, the Company offers price protection discounts to certain customers when new capture device models are released and the customer has remaining inventory on hand of the older capture device model. The Company estimates price protection discounts, which are recorded as a reduction of revenue, by evaluating inventory currently held by the customer subject to price protection. The Company records reductions to revenue for sales incentives when the related revenue is recognized.
	Cost of revenue
	Cost of revenue includes actual product cost, the cost of shipping, depreciation and amortization, warehousing and processing inventory, warranty replacement costs, excess and obsolete inventory write-downs, certain allocated costs and license fees paid to third parties.
	Shipping costs
	The Company records amounts billed to customers for shipping costs as revenue in the accompanying Consolidated Statements of Operations. The Company classifies related shipping and handling costs incurred as cost of revenue in the accompanying Consolidated Statements of Operations.
	Deferred revenue
	Deferred revenue is comprised of customer deposits, undelivered post contract support and undelivered web sale shipments. The cost of revenue related to deferred web sales is included in inventory.
	Research and development
	Research and development expense includes internal and external costs. Internal costs include employee related expenses, equipment costs, depreciation expense and allocated facility costs. External research and development expenses consist of costs associated with consultants, tooling and prototype materials.
	Substantially all research and development expense is related to new research and development efforts and the designing of significant improvements to existing products. Research and development expense to establish the technological feasibility of the Company’s internally developed software is expensed as incurred. To date, the period between achieving technological feasibility and the release of internally developed software to be sold, leased, or marketed has been short and development costs qualifying for capitalization have been insignificant.
	Advertising costs
	Advertising costs consist of costs associated with print, television and ecommerce media advertisements and are expensed as incurred. A significant amount of the Company’s promotional expenses result from payments under event, resort and athlete sponsorship contracts. Accounting for sponsorship payments is based upon specific contract provisions. These sponsorship arrangements are considered to be executory contracts and, as such, the costs are recognized as performance under the contract is received. The costs associated with preparation of sponsorship activities, including the supply of GoPro products, media team support and activation fees are considered costs of producing advertising and are expensed as incurred. Prepayments made under sponsorship agreements are included in prepaid expenses or other assets depending on the period to which the prepayment applies. Advertising costs were $47.2 million, $55.5 million, and $46.9 million for the years ended December 31, 2014, 2013, and 2012, respectively.
	Stock-based compensation
	The Company accounts for stock-based compensation activity using the fair value recognition and measurement provisions of GAAP. These provisions require the all share-based payments to employees, including grants of stock options, restricted stock units (RSUs), restricted stock awards (RSAs) and purchases under the Company's Employee Stock Purchase Plan (ESPP), to be measured based on the grant-date fair value of the awards, with the resulting expense generally recognized over the period during which the employee is required to perform service in exchange for the award. The fair value of each stock option granted is estimated using the Black-Scholes option pricing model. The fair value of service-based RSUs and RSAs granted represents the closing price of the Company's common stock on the date of grant. The fair value of stock-based awards with market and service conditions are estimated using a Monte Carlo valuation model. The fair value of purchases under the Company's ESPP is calculated based on the closing price of the Company's common stock on the date of grant. For service-based awards, stock-based compensation is recognized on a straight-line basis over the requisite service period, net of estimated forfeitures. The forfeiture rate is based on an analysis of the Company's actual historical forfeitures. For performance and market-based awards which also require a service period, the Company uses graded vesting over the longer of the derived service period or when the performance or market condition is satisfied.
	The Company accounts for stock options and restricted stock issued to nonemployees based on the fair value of the awards determined using the Black-Scholes option pricing model. The fair value of awards granted to nonemployees is re-measured as the awards vest, and the resulting change in fair value, if any, is recognized in the Company's Consolidated Statement of Operations during the period the related services are rendered.
	The Company recognizes a benefit from stock-based compensation as additional paid-in capital if an incremental tax benefit is realized by following the with-and-without approach. In addition, the indirect effects of stock-based compensation deductions are reflected in the income tax provision for purposes of measuring the excess tax benefit at settlement of awards.
	Sales taxes
	Sales taxes collected from customers and remitted to respective governmental authorities are not included in revenue and are reflected as a liability on the accompanying Consolidated Balance Sheets.
	Foreign currency
	The Company and the Company’s wholly-owned subsidiaries use the U.S. dollar as their functional currency. Local currency transactions of the Company’s international operations are remeasured into U.S. dollars at the rates of exchange in effect at the date of the transaction. For those wholly-owned subsidiaries with assets or liabilities denominated in currencies other than the U.S. dollar, non-monetary assets are remeasured into U.S. dollars using historical rates of exchange. Monetary assets and liabilities are remeasured into U.S. dollars using exchange rates prevailing on the balance sheet date. Transaction gains and losses were not material for all periods presented and are included in other expense, net, in the accompanying Consolidated Statements of Operations.
	Income taxes
	The Company utilizes the asset and liability method of accounting for income taxes which requires the recognition of deferred tax assets and liabilities for expected future consequences of temporary differences between the financial reporting and income tax bases of assets and liabilities using enacted tax rates. Management makes estimates, assumptions and judgments to determine the Company’s provision for income taxes and also for deferred tax assets and liabilities, and any valuation allowances recorded against the Company’s deferred tax assets. The Company assesses the likelihood that its deferred tax assets will be recovered from future taxable income and, to the extent the Company believes that recovery is not likely, the Company must establish a valuation allowance.
	The calculation of the Company’s current provision for income taxes involves the use of estimates, assumptions and judgments while taking into account current tax laws, interpretation of current tax laws and possible outcomes of future tax audits. The Company has established reserves to address potential exposures related to tax positions that could be challenged by tax authorities. Although the Company believes its estimates, assumptions and judgments to be reasonable, any changes in tax law or its interpretation of tax laws and the resolutions of potential tax audits could significantly impact the amounts provided for income taxes in the Company’s consolidated financial statements.
The calculation of the Company’s deferred tax asset balance involves the use of estimates, assumptions and judgments while taking into account estimates of the amounts and type of future taxable income. Actual future operating results and the underlying amount and type of income could differ materially from the Company’s estimates, assumptions and judgments thereby impacting the Company’s financial position and results of operations.
The Company has adopted ASC 740-10 “Accounting for Uncertainty in Income Taxes” that prescribes a recognition threshold and measurement attribute for the financial statement recognition and measurement of uncertain tax positions taken or expected to be taken in the Company’s income tax return, and also provides guidance on derecognition, classification, interest and penalties, accounting in interim periods, disclosure and transition.
The Company includes interest and penalties related to unrecognized tax benefits within income tax expense in the accompanying Consolidated Statements of Operations.
Recent accounting pronouncements
On May 28, 2014, the Financial Accounting Standards Board (FASB) issued a new accounting standard update on revenue from contracts with customers, which supersedes the revenue recognition requirements in Topic 605, Revenue Recognition, and most industry-specific guidance throughout the Industry Topics of the Codification. The new guidance adheres to the core principle that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. To achieve this principle, the new guidance lists five steps that entities should follow, including identifying the contract with a customer, identifying the performance obligations in the contract, determining the transaction price, allocating the transaction price to the performance obligations in the contract and recognizing revenue when the entity satisfies a performance obligation. The new guidance becomes effective for the Company on January 1, 2017, with retrospective application permitted. Early application is not permitted. The Company is currently assessing the impact of this new guidance.
In June 2014, the FASB issued a new accounting standard update on the accounting for share-based payments when the terms of an award provide that a performance target could be achieved after the requisite service period. The amendments require that a performance target that affects vesting and that could be achieved after the requisite service period is treated as a performance condition. Compensation cost should be recognized in the period in which it becomes probable that the performance target will be achieved and should represent the compensation cost attributable to the period(s) for which the requisite service has already been rendered. The new guidance becomes effective for the Company on January 1, 2016, with early adoption permitted. The Company does not believe the adoption of this guidance will have a material impact on its consolidated financial statements.
In August 2014, the FASB issued new guidance related to the disclosures around going concern. The new standard update provides guidance around management's responsibility to evaluate whether there is substantial doubt about an entity's ability to continue as a going concern and to provide related footnote disclosures. The new guidance is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2016. Early adoption is permitted. The Company does not believe the adoption of this guidance will have a material impact on its consolidated financial statements.

Fair_value_measurements

Fair value measurements	12 Months Ended
	Dec. 31, 2014
Fair Value Disclosures [Abstract]
Fair value measurements	Fair value measurements
	The Company measures its cash equivalents and marketable securities at fair value based on an expected exit price as defined by the authoritative guidance on fair value measurements, which represents the amount that would be received on the sale of an asset or paid to transfer a liability, as the case may be, in an orderly transaction between market participants. As such, fair value may be based on assumptions that market participants would use in pricing an asset or liability. The authoritative guidance on fair value measurements establishes a consistent framework for measuring fair value on either a recurring or nonrecurring basis, whereby, inputs used in valuation techniques are assigned a hierarchical level.
	The Company’s assets that are measured at fair value on a recurring basis, by level, within the fair value hierarchy as of December 31, 2014 are summarized as follows:
		December 31, 2014
	(in thousands)	Level 1		Level 2		Level 3		Total
	Cash equivalents:
	Money market funds	$	80,968	$	—	$	—	$	80,968
	Corporate debt securities	—		2,000		—		2,000
	Total cash equivalents	$	80,968	$	2,000	$	—	$	82,968
	Marketable securities:
	U.S. treasury securities	$	1,994	$	—	$	—	$	1,994
	U.S. agency securities	—		7,020		—		7,020
	Commercial paper	—		2,497		—		2,497
	Corporate debt securities	—		90,816		—		90,816
	Total marketable securities	$	1,994	$	100,333	$	—	$	102,327
	The fair value of the Company's Level 1 financial instruments, which are traded in active markets, are based on quoted market prices for identical instruments. The fair value of the Company's Level 2 fixed income securities are obtained from an independent pricing service, which may use quoted market prices for identical or comparable instruments or model driven valuations using observable market data or inputs corroborated by observable market data. The Company's procedures include controls to ensure that appropriate fair values are recorded, including comparing the fair values obtained from the Company's pricing service against fair values obtained from other independent sources.

Balance_sheet_components

Balance sheet components	12 Months Ended
	Dec. 31, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Balance sheet components	Balance sheet components
	Cash, cash equivalents and marketable securities
	Cash, cash equivalents and marketable securities consist of the following:
		December 31,
	(in thousands)	2014				2013
	Cash and cash equivalents:
	Cash	$	236,961			$	101,410
	Money market funds	80,968
	Corporate debt securities	2,000				—
	Cash and cash equivalents	$	319,929			$	101,410
	Marketable securities:
	Commercial paper	$	2,497			$	—
	U.S. treasury securities	1,994				—
	U.S. agency securities	7,020				—
	Corporate debt securities	90,816				—
	Marketable securities	$	102,327			$	—
	$58.8 million of the Company’s marketable securities have a contractual maturity of one year or less and $43.5 million of the Company’s marketable securities have a contractual maturity of one to two years. As of December 31, 2014, marketable securities were recorded at their amortized cost which approximates fair value.
	Inventories, net
	Inventories, net consisted of the following:
		December 31,
	(in thousands)	2014				2013
	Components	$	4,324			$	8,000
	Finished goods	148,702				103,994
	Inventories, net	$	153,026			$	111,994
	Prepaid expenses and other current assets
	Prepaid expenses and other current assets consisted of the following:
		December 31,
	(in thousands)	2014				2013
	Prepaid income taxes	$	26,504			$	—
	Current deferred tax assets	24,218				15,173
	Prepaid expenses	3,905				2,739
	Prepaid licenses	2,053				1,091
	Deposits	1,244				2,049
	Other current assets	5,845				915
	Prepaid expenses and other current assets	$	63,769			$	21,967
	Property and equipment, net
	Property and equipment, net consisted of the following;
		Useful life		December 31,
	(in thousands)	(in years)		2014				2013
	Leasehold improvements	3–7		$	22,787			$	20,111
	Computers, software, equipment and furniture	2–4		24,636				11,988
	Tooling	1–4		16,159				8,799
	Construction in progress			3,944				2,151
	Tradeshow equipment	2–5		2,863				2,613
	Automobiles	3–5		967				856
	Gross property and equipment			71,356				46,518
	Less: Accumulated depreciation and amortization			(29,800		)		(14,407		)
	Property and equipment, net			$	41,556			$	32,111
	Depreciation expense was $16.8 million, $10.9 million and $2.8 million for years ended December 31, 2014, 2013 and 2012, respectively.
	Goodwill and acquired intangible assets
	Goodwill at December 31, 2012, 2013 and December 31, 2014 was as follows:
	(In thousands)
	Goodwill at December 31, 2012	$	4,233
	Acquisition	9,862
	Goodwill at December 31, 2013	$	14,095
	Adjustments	—
	Goodwill at December 31, 2014	$	14,095
	Goodwill increased by approximately $9.9 million due to the acquisition of General Things, Inc. (General Things) in the fourth quarter of 2013. There were no impairments or other additions to goodwill during the years ended December 31, 2013 or 2014.
	Acquired intangible assets at December 31, 2014, and 2013 were as follows:
		31-Dec-14										Weighted average remaining useful life
	(in thousands)	Gross				Accumulated				Net		(in years)
						amortization
	Developed technology	$	6,130			$	(3,427	)		$	2,703	2.4
	Tradename	664				(509		)		155		1.2
Customer relationships	170				(170		)		—		0
Noncompete agreements	311				(247		)		64		0.8
Domain name	15				—				15
	$	7,290			$	(4,353	)		$	2,937
	31-Dec-13										Weighted
											average
											remaining
											useful life
(in thousands)	Gross				Accumulated				Net		(in years)
					amortization
Developed technology	$	5,330			$	(2,517	)		$	2,813	3.2
Tradename	664				-376				288		2.2
Customer relationships	170				-161				9		0.2
Noncompete agreements	311				-166				145		1.8
Domain name	15				—				15
	$	6,490			$	(3,220	)		$	3,270
Amortization expense for the years ended December 31, 2014, 2013, and 2012 was $1.1 million, $1.1 million, and $1.2 million, respectively.
The estimated future amortization expense of acquired intangible assets to be charged to cost of revenue and operating expenses as of December 31, 2014, is as follows:
(in thousands)	Cost of				Operating				Total
	revenue				expenses
Years ending December 31,
2015	$	888			$	464			$	1,352
2016	888				289				1,177
2017	149				244				393
	$	1,925			$	997			$	2,922
Other long-term assets
Other long-term assets consisted of the following:
	December 31,
(in thousands)	2014				2013
POP displays	$	18,743			$	22,379
Long-term deferred tax assets	8,611				736
Deposits	4,706				2,698
Long-term licenses and other	4,000				4,000
Deferred financing charges	—				947
Deferred public offering costs	—				1,395
Other long-term assets	$	36,060			$	32,155
POP display amortization included in sales and marketing expense was $18.0 million, $13.5 million, and $8.6 million for the years ended December 31, 2014, 2013 and 2012, respectively.
Accrued liabilities
Accrued liabilities consisted of the following:
	December 31,
(in thousands)	2014				2013
Accrued payables	$	57,064			$	49,975
Employee related liabilities	28,959				11,932
Accrued sales incentives	9,635				4,909
Warranty liability	6,025				3,691
Customer deposits	4,903				1,316
Sales commissions	4,254				2,454
Other	4,935				12,114
Accrued liabilities	$	115,775			$	86,391

Redeemable_convertible_preferr

Redeemable convertible preferred stock	12 Months Ended
	Dec. 31, 2014
Equity [Abstract]
Redeemable convertible preferred stock	Redeemable convertible preferred stock
	As of December 31, 2013, there were 36,000,000 shares of Series A preferred stock authorized and 30,523,036 shares of Series A preferred stock issued and outstanding. Concurrent with the close of the IPO in July 2014, all shares of Series A preferred stock were converted into Class B common stock. Prior to their conversion to Class B common stock, the Series A preferred stock had the following terms:
	Conversion
	Each share of Series A preferred stock was convertible, at the option of the holder, into shares of common stock at a rate of 1-for-1. The conversion of all outstanding Series A preferred stock occurred in connection with the closing of the IPO.
	Voting rights
	The holders of shares of the Company’s Series A preferred stock voted equally with shares of Class B common stock on an as-if converted to common stock basis on all matters, including the election of directors.
	Dividend rights
	The holders of each Series A share were entitled to receive any noncumulative dividends on an equal basis with common stock, when and if declared by the Board.
	Redemption rights
	In the event of any liquidation, dissolution, or winding up of the Company, whether voluntary or involuntary, the Company was required to redeem shares of Series A preferred stock at the original issue price of $2.53 per share plus any noncumulative dividends declared by the Board. If the holders had not previously exercised the rights granted to them, the Series A preferred stock was redeemable within 365 days after July 1, 2017, subject to a majority vote of the then outstanding Series A preferred shares. As the redemption events described above could have occurred and were not solely within the Company’s control, all shares of preferred stock were presented outside of permanent equity.

Stockholders_equity_deficit

Stockholders' equity (deficit)	12 Months Ended
	Dec. 31, 2014
Equity [Abstract]
Stockholders' equity (deficit)	Stockholders’ equity (deficit)
	Preferred stock
	Upon completion of its IPO in July 2014, the Company filed a Restated Certificate of Incorporation, which authorized the issuance of undesignated preferred stock with rights and preferences, including voting rights, designated from time to time by its board of directors. As of December 31, 2014, there were 5,000,000 shares of preferred stock authorized, and no shares issued or outstanding.
	Common stock
	As of December 31, 2014, the Company had 500,000,000 shares of Class A common stock authorized and 150,000,000 shares of Class B common stock authorized. As of December 31, 2014, 52,091,317 shares of Class A stock were issued and outstanding and 77,023,371 shares of Class B stock were issued and outstanding.
	In June 2014, the Company filed a Restated Certificate of Incorporation which established two classes of authorized common stock (Reclassification): Class A common stock and Class B common stock. As a result, all outstanding shares of common stock were converted into shares of Class B common stock. The rights of the holders of Class A and Class B common stock are identical, except with respect to voting and conversion. Each share of Class A common stock is entitled to one vote per share and each share of Class B common stock is entitled to ten votes per share. Each share of Class B common stock is convertible at any time at the option of the stockholder into one share of Class A common stock and has no expiration date. The Class B common stock is also convertible into Class A common stock on the same basis upon any transfer, whether or not for value, except for “Permitted Transfers” as defined in the Company’s Restated Certificate of Incorporation. Each share of Class B common stock will convert automatically into one share of Class A common stock upon the date when the outstanding shares of Class B common stock represent less than 10% of the aggregate number of shares of common stock then outstanding.
	As of December 31, 2013, the Company had 150,000,000 shares of common stock authorized for issuance. At December 31, 2013, there were 81,420,040 shares of common stock issued and outstanding.
	The Company had the following shares of common stock reserved for issuance upon the exercise of equity instruments as of December 31, 2014 (in thousands):
	Stock options outstanding	25,134
	Restricted stock units outstanding	4,307
	Stock options, restricted stock and RSUs available for future grants	12,885
		42,326
	Stock compensation plans
	2014 Equity Incentive Plan
	In June of 2014, stockholders approved the 2014 Equity Incentive Plan (2014 EIP) and the Company’s authority to grant new awards under the 2010 Equity Incentive Plan (2010 EIP) was terminated. The 2014 EIP provides for equity grants to employees, including executive officers, and non-employee directors and contractors, including stock options, RSUs, RSAs, stock appreciation rights, stock bonuses, and performance awards. Options granted under the 2014 EIP generally expire within 10 years from the date of grant and generally vest over four years, at the rate of 25% on the first anniversary of the date of grant and ratably on a monthly basis over the remaining 36-month period thereafter based on continued service and are exercisable for shares of the Company’s Class A common stock. Options with performance or market-based conditions are generally subject to a required service period along with the performance or market condition. RSUs granted under the 2014 EIP generally vest either annually or quarterly over three or four years based upon on continued service, and are settled upon vesting as shares of the Company’s Class A common stock. All awards that expire, are reacquired or repurchased at cost, are cancelled or otherwise terminate and shares that are withheld to satisfy exercise proceeds and tax withholding obligations are returned to the plan and are available for grant in conjunction with the issuance of new stock awards under the 2014 EIP. Awards settled in cash will not reduce the number of shares available under the 2014 EIP.
	As of December 31, 2014 the 2014 EIP permitted the Company to grant up to 13,973,723 shares of the Company’s Class A common stock, which includes 339,259 shares previously reserved as Class B common stock but unissued under the 2010 EIP that became available for issuance as Class A common stock under the 2014 EIP, and 164,235 shares previously issuable pursuant to awards under the 2010 EIP that expired, forfeited or terminated unexercised, or were repurchased or used to pay the exercise price of an option or withheld to satisfy tax withholding obligations, that became available for issuance as Class A common stock under the 2014 EIP. The share reserve may also increase to the extent that outstanding awards under the 2010 EIP expire or terminate unexercised or shares that are repurchased at cost or used to pay the exercise price of an option or withheld to satisfy tax withholding obligations.
	2010 Equity Incentive Plan
	In August 2010, the Board approved the adoption of the 2010 EIP. The 2010 EIP provided for equity grants to employees, including executive officers, and non-employee directors and contractors that permits the granting of stock options, RSUs, RSAs and stock appreciation rights. Options granted under the 2010 EIP generally expire within 10 years from the date of grant. Options and RSUs granted under the 2010 Plan generally vest over four years based on continued service, and are settled or exercisable upon vesting as shares of the Company’s Class B common stock. Following the Reclassification, all shares subject to the 2010 EIP were reclassified into Class B common stock and all outstanding options under the 2010 EIP will become Class B shares upon exercise. In the second quarter of 2014, the Company terminated the authority to grant new awards under the 2003 Plan.
	Employee Stock Purchase Plan
	In June 2014, the Company approved the 2014 Employee Stock Purchase Plan (ESPP). The ESPP allows eligible employees to purchase shares of the Company's Class A common stock through payroll deductions at a price equal to 85% of the lower of the fair market values of the stock as of the beginning or the end of six-month offering periods. An employee's payroll deductions under the ESPP are limited to 15% of their eligible compensation and employees may not purchase more than 2,500 shares of stock per offering period. As of December 31, 2014, 3,367,557 shares were reserved for future issuance under the ESPP.
	Stock option activity
	A summary of the Company’s stock option activity and related information is as follows:
					Options outstanding
	(shares in thousands)	Shares			Shares			Weighted-				Weighted-			Total intrinsic		Weighted-	Aggregate
		available						average				average			value of		average	intrinsic value
		for grant						exercise				grant-			options		remaining	(in thousands)
								price				date fair			exercised		contractual
												value			(in thousands)		term
																	(in years)
	Outstanding at December 31, 2011:	400			26,361			$	0.8
	Additional shares authorized	2,100			—			—
	Granted	(1,418	)		1,418			5.1				$	5.02
	Exercised	—			-2,486			1.11							$	30,605
	Forfeited/Cancelled	891			-891			1.43
	Outstanding at December 31, 2012:	1,973			24,402			$	1								8.33	$	310,454
	Additional shares authorized	2,000
	Granted	-2,906			2,906			15.14				$	8.45
	Exercised	—			-345			2.23							$	4,564
	Forfeited/Cancelled	239			-239			6.31
	Outstanding at December 31, 2013:	1,306			26,724			$	2.47								7.55	$	367,395
	Additional shares authorized	21,970			—			—
	Granted	(5,208	)		5,208			21.68				$	11.51
	RSUs granted	(5,573	)		—			—
	Exercised	—			(6,419	)		1.24							$	253,332
	Forfeited/Cancelled	390			(379	)		12.11
	Outstanding at December 31, 2014:	12,885			25,134			$	6.62								7.09	$	1,425,339
	Exercisable at December 31, 2014				17,971			$	2								6.37	$	1,100,208
	Vested and expected to vest at				24,743			$	6.43								7.06	$	1,407,823
	31-Dec-14
	The total fair value of stock options vested in the years ended December 31, 2014, 2013, and 2012 was $16.0 million, $5.2 million, and $3.0 million, respectively. As of December 31, 2014, unearned stock-based compensation estimated to be expensed related to unvested employee options was $62.6 million and is expected to be recognized over a weighted-average period of 2.7 years.
	The following is a further breakdown of the options outstanding at December 31, 2014:
		Options outstanding								Options exercisable
	(shares in thousands)	Shares		Weighted-		Weighted-				Shares			Weighted-
		outstanding		average		average				exercisable			average
				remaining		exercise							exercise
				contractual		price							price
				life (in years)
	Range of exercise prices
	$    0.18–0.66	7,696		5.75		$	0.62			7,696			$	0.62
	0.76–0.76	7,769		6.46		0.76				7,572			0.76
	1.52–2.96	1,606		7.01		1.91				1,119			1.86
	8.30–8.30	462		7.7		8.3				244			8.3
	13.72–15.59	1,771		8.36		14.68				687			14.61
	16.19–16.39	2,466		9.06		16.26				368			16.21
18.40–18.40	2,793		9.42		18.4				285			18.4
38.84–81.50	571		9.65		54.9				—			—
$  0.18–81.50	25,134		7.09		$	6.62			17,971			$	2
RSAs and early-exercised stock options' activity
RSAs represent share awards of the Company’s common stock that are generally subject to repurchase at the original issuance price upon termination of services prior to vesting. These repurchase terms are considered to be a forfeiture provision and do not result in mark-to-market accounting each reporting period. The Company has also granted options that provide certain option holders the right to exercise unvested options for shares of restricted stock. RSAs and restricted shares issued upon early exercise of stock are legally issued and outstanding, but are only deemed outstanding for basic earnings per share computation purposes upon the lapse of the Company’s right of repurchase. Cash received from option holders for exercise of unvested options is treated as a refundable deposit shown as a liability on the accompanying Consolidated Balance Sheets, and reclassified to Stockholders’ Equity (Deficit) as the Company’s repurchase right lapses.
A summary of the Company’s restricted stock and early-exercised stock options subject to repurchase activity is as follows:
(in thousands except for weighted average grant date fair value)	Shares		Weighted-				Aggregate
			average				intrinsic
			grant date				value
			fair value
Non-vested shares at December 31, 2011	644		$	2.44			$	711
Vested	-212
Non-vested shares at December 31, 2012	432		2.44				5,274
Granted	430		16.19				6,962
Vested	-375
Non-vested shares at December 31, 2013	487		11.03				7,628
Vested	-470
Non-vested shares at December 31, 2014	17		$	6.3			$	1,017
The total fair value of restricted stock and early exercised stock options subject to repurchase vested in the year ended December 31, 2014, 2013, and 2012 was $11.2 million, $6.1 million, and $2.9 million, respectively. As of December 31, 2014, the early exercised stock options were fully vested, and the amount of unearned stock-based compensation related to unvested restricted stock was $0.1 million, with a weighted average remaining vesting term of 0.1 years.
In December 2011, the Company granted 433,500 shares of restricted stock and 210,000 stock options at an exercise price of $1.52 per share to two consultants in accordance with the terms of their service agreements, subject to monthly vesting over a three-year service period and a two-year service period, respectively.
RSU activity
The Company has granted RSUs pursuant to the EIP. RSUs are share awards that, upon vesting, will deliver to the holder shares of the Company’s common stock. Typically, vesting of RSUs is subject to the employee’s continuing service to the Company on the vesting date. The cost of these awards is determined using the fair value of the Company’s common stock on the date of grant, and compensation is recognized on a straight-line basis over the requisite vesting period. The Company has also issued RSUs with both a market condition and a service condition.  The Company estimates the fair value of these market-based RSUs using a Monte Carlo valuation model on the date of grant.
The following table summarizes the activities of the Company’s RSUs:
(in thousands except for weighted average grant date fair value)	Shares			Weighted- average grant date fair value
Non-vested shares at December 31, 2013 and 2012	270			$	1.52
Granted	5,573			$	22.01
Vested	(1,533	)		$	18.42
Forfeited	(3	)		$	57.73
Non-vested shares at December 31, 2014	4,307			$	21.98
There were no RSUs awarded during the years ended December 31, 2012 and 2013. As of December 31, 2014, the amount of unearned stock-based compensation estimated to be expensed with respect to RSUs was $94.7 million, and the weighted average remaining vesting term was 2.9 years. The total fair value of RSUs vested during the year ended December 31, 2014 was $28.2 million.
In June of 2014, the Company issued 4,500,000 RSU's to the Chief Executive Officer (CEO RSUs) which included 1,500,000 RSUs that vested immediately upon grant. The balance as of December 31, 2014 included the remaining 3,000,000 unvested RSUs that vest subject to performance criteria set by the Compensation Committee as well as with continued service over a three-year period.
Fair value disclosures
The Company measures compensation expense for all stock-based payment awards, including stock options, RSUs, and RSAs granted to employees and purchases under the Company's ESPP, based on the estimated fair values on the date of the grant. The fair value of stock options granted and purchases under the Company's ESPP is estimated using the Black-Scholes option pricing model.
The Black-Scholes option pricing model requires the following major inputs:
Fair value of common stock. The Company uses the closing price of the Company's common stock on the date of grant. Prior to the Company's IPO which completed in July 2014, the fair value of its common stock was determined by its board of directors, which intended all options granted to be exercisable at a price per share not less than the per share fair value of the common stock underlying those options on the date of grant. The valuations of the Company's common stock were determined in accordance with the guidelines outlined in the American Institute of Certified Public Accountants Practice Aid, Valuation of Privately-Held-Company Equity Securities Issued as Compensation. Upon completion of the Company's initial public offering in July 2014, its Class A common stock was valued by reference to its publicly traded price.
Expected volatility. Expected volatility is a measure of the amount by which the stock price is expected to fluctuate. The Company estimates the expected volatility of its stock options at their grant date by taking the average historical volatility of a group of comparable publicly traded companies over a period equal to the expected life of the options.
Expected term. Expected term represents the period over which the Company anticipates stock-based awards to be outstanding. As the Company has undergone significant operational and structural changes, the historical exercise data do not provide a reasonable basis upon which to estimate expected life. As a result, the Company used the simplified method, as provided under Staff Accounting Bulletin Topic 14.D, “Share-Based Payment,” to calculate the expected term estimate based on the options’ vesting term and contractual terms. Under the simplified method, the expected life is equal to the average of the stock-based award’s weighted average vesting period and its contractual term.
Risk-free interest rate. The risk-free interest rate is the estimated average interest rate based on U.S. Treasury zero-coupon notes with terms consistent with the expected life of the awards.
Expected dividends. Since the Company does not anticipate paying any recurring cash dividends in the foreseeable future, it uses an expected dividend yield of 0% in stock option valuation models.
The fair value of stock options granted was estimated as of the grant date using the assumptions listed in the following table:
	Years ended December 31,
	2014		2013		2012
Volatility	54%–56%		56%–60%		56%–60%
Expected term (years)	5.3–6.3		5.3–6.1		5.1–6.1
Risk-free interest rate	1.7%–2.0%		0.8%–2.4%		0.8%–2.4%
Dividend yield	—%		—%		—%
Expected forfeiture rate	4%–6%		6%		5%-7%
Weighted average fair value	$11.51		$8.45		$5.08
To estimate the fair value of the CEO RSUs subject to a market condition that were granted during the year ended December 31, 2014, the Company used a Monte Carlo valuation model with the following assumptions:
Expected volatility	50.90%
Expected term (years)	10
Risk-free interest rate	2.69%
Dividend yield	—%
Grant date fair value of underlying shares	$18.40
The following assumptions were used to calculate the fair value of stock purchase rights granted under the Company's ESPP during the year ended December 31, 2014:
Volatility	45.50%
Expected term (years)	0.6
Risk-free interest rate	0.10%
Dividend yield	—%
Expected forfeiture rate	4%-6%
Stock-based compensation expense
The following table summarizes stock-based compensation expense related to stock options, restricted stock and RSUs for the three years ended December 31, 2014, 2013 and 2012:
	Years ended December 31,
(in thousands)	2014				2013				2012
Stock-based compensation expense by type of award
Stock options	$	17,450			$	8,468			$	8,165
RSUs	41,412				—				—
RSAs	10,833				2,419				991
ESPP	1,704				—				—
Total stock-based compensation expense	$	71,399			$	10,887			$	9,156
The following table summarizes stock-based compensation expense as reported in the Company’s accompanying Consolidated Statements of Operations:
	Years ended December 31,
(in thousands)	2014				2013				2012
Cost of revenue	$	835			$	690			$	333
Research and development	11,640				3,003				1,452
Sales and marketing	10,428				5,670				6,335
General and administrative	48,496				1,524				1,036
Total stock-based compensation expense	71,399				10,887				9,156
Total tax benefit recognized	-19,471				-1,104				-1,091
Decrease in net income	$	51,928			$	9,783			$	8,065
Stock-based compensation expense related to the CEO RSUs for the year ended December 31, 2014 was $38.3 million and was included in general and administrative expense in the accompanying Consolidated Statement of Operations.
In October 2013, the Company issued 430,000 shares of restricted stock to two founders of an acquired company, of which 322,500 were subject to monthly vesting over a three-year service period. During the year ended December 31, 2014, vesting was accelerated for 195,740 shares of these shares due to the termination of one of the founders, per the terms of the original award agreements. The Company recorded a charge of $3.2 million to research and development in the accompanying Consolidated Statement of Operations.
Stock option modifications
During the year ended December 31, 2012, the Company modified options to purchase 250,000 shares of common stock of three employees to accelerate vesting and extend the time allowed to exercise the stock options in conjunction with termination of employment. The Company recorded a charge of $1.1 million related to the modification of these awards, of which $1.0 million was recorded to sales and marketing expense and the remaining amounts to research and development and general and administrative expenses based on the employees’ functional role within the Company.
Compensation cost recognized upon employee sale of shares to the Chief Executive Officer (CEO)
In December 2012, eight employees sold 760,500 shares of their common stock for $13.0 million to the Company’s CEO. The stock was sold at $17.08 per share, which was greater than the determined fair value of the common stock at the time of sale. The fair value was determined by the Board, based on the Company’s development and sales efforts, revenue growth, independent third-party valuations and additional objective and subjective factors relating to the Company’s business. The Company determined that the amount paid by the Company’s CEO exceeded the estimated fair value of these shares by $2.6 million and concluded that the value transferred to employees in excess of the fair value of shares sold was additional compensation to the selling employees. As a result, the Company recorded compensation expense of $2.6 million, of which $0.3 million was recorded to research and development, $1.7 million was recorded to sales and marketing and $0.6 million was recorded to general and administrative expense in the accompanying Consolidated Statements of Operations. Of the 760,500 shares sold, the Company's CEO purchased 240,000 shares from two employees who are family members of the Company’s CEO.

Net_income_per_share_attributa

Net income per share attributable to common stockholders	12 Months Ended
	Dec. 31, 2014
Earnings Per Share [Abstract]
Net income per share attributable to common stockholders	Net income per share attributable to common stockholders
	Basic and diluted net income per share attributable to common stockholders is presented in conformity with the two-class method required for participating securities. Prior to the IPO and their conversion, the Company considered its redeemable convertible preferred stock to be participating securities. In addition, the Company considers shares issued upon the early exercise of options subject to repurchase and non-vested restricted shares to be participating securities, as the holders of these shares have a nonforfeitable right to dividends.
	Basic net income (loss) per share attributable to common stockholders is computed by dividing the net income attributable to common stockholders by the weighted-average number of common shares outstanding during the period. All participating securities are excluded from basic weighted average common shares outstanding. Diluted net income (loss) per share attributable to common stockholders is computed by dividing the net income attributable to common stockholders by the weighted-average number of common shares outstanding, including all potentially dilutive common shares, if the effect of each class of potential shares of common stock is dilutive.
	The undistributed earnings are allocated based on the contractual participation rights of the Class A and Class B common shares as if the earnings for the year have been distributed. As the liquidation and dividend rights are identical, the undistributed earnings are allocated on a proportionate basis. The computation of the diluted net income (loss) per share of Class A common stock assumes the conversion of Class B common stock, while diluted net income (loss) per share of Class B common stock does not assume the conversion of Class A common stock as Class A common stock is not convertible into Class B common stock.
	The following table presents the calculations of basic and diluted net income per share attributable to common stockholders:
			Year ended December 31,
	(in thousands, except per share amounts)		2014							2013			2012
			Class A				Class B			Common			Common
	Numerator:
	Allocation of net income		$	16,647			$	111,441		$	60,578		$	32,262
	Less: common stock distributed earnings		—				—			—			(84,828		)
	Less: preferred stock distributed earnings, including accumulated accretion		—				—			—			(26,927		)
	Less: unvested early exercised options and restricted stock distributed earnings		—				—			—			(454		)
	Less: undistributed earnings allocable to:
	holders of preferred stock		(2,102		)		(14,067		)	(16,521		)	—
	holders of unvested early exercised options and restricted stock		(45		)		(298		)	(206		)	—
	Undistributed net income (loss) attributable to common stockholders—basic		$	14,500			$	97,076		$	43,851		$	(79,947	)
	Add: adjustments to net income for dilutive securities allocable to:
	holders of preferred stock		2,229				1,940			2,281			—
	holders of unvested early exercised options and restricted stock		48				41			28			—
	Reallocation of undistributed earnings as a result of conversion of Class B to Class A		97,076				—			—			—
	Reallocation of undistributed earnings to Class B shares		—				2,237			—			—
	Undistributed net income (loss) attributable to common stockholders—diluted		$	113,853			$	101,294		$	46,160		$	(79,947	)
	Distributed earnings to common stockholders		$	—			$	—		$	—		84,828
	Denominator:
	Weighted-average common shares—basic		13,575				90,878			81,018			74,226
	Conversion of Class B to Class A common stock outstanding		90,878				—			—			—
	Effect of potentially dilutive securities:
	Stock options and RSUs		19,177				19,115			17,923			—
	Weighted-average common shares—diluted		123,630				109,993			98,941			74,226
	Net income per share attributable to common stockholders:
	Distributed earnings—basic		$	—			$	—		$	—		$	1.15
	Undistributed earnings—basic		$	1.07			$	1.07		$	0.54		$	(1.08	)
	Basic net income per share		$	1.07			$	1.07		$	0.54		$	0.07
	Distributed earnings—diluted		$	—			$	—		$	—		$	1.15
	Undistributed earnings—diluted		$	0.92			$	0.92		$	0.47		$	(1.08	)
	Diluted net income per share		$	0.92			$	0.92		$	0.47		$	0.07
	The following potentially dilutive shares of common stock subject to options, unvested stock awards and redeemable convertible preferred stock were not included in the calculation of diluted shares outstanding as the effect would have been anti-dilutive:
		Year ended December 31,
	(in thousands)	2014		2013		2012
	Series A redeemable convertible preferred stock	15,136		30,523		30,523
	Stock options	360		1,409		24,402
	Restricted stock awards and RSUs	425		380		432
		15,921		32,312		55,357

Financing_arrangements

Financing arrangements	12 Months Ended
	Dec. 31, 2014
Debt Disclosure [Abstract]
Financing arrangements	Financing arrangements
	Credit facility
	On December 21, 2012, the Company entered into a $170.0 million syndicated senior secured credit facility consisting of a $120.0 million three-year term loan facility and a $50.0 million four-year revolving credit facility. The Company received net proceeds of $127.6 million, net of $2.4 million of debt issuance and lender costs. The debt issuance and lender costs were allocated between the term loan facility and the revolving credit facility based on the maximum lending commitment amounts. The debt issuance costs allocated to the term loan facility were reported as deferred charges and the lender costs allocated to the term loan facility were included in the carrying value of the term loan as debt discount. Borrowings under the credit facility were collateralized by substantially all of the assets of the Company. In August 2014, the Company terminated this credit facility.
	As of December 31, 2013, $114.0 million of the term loan was outstanding and the remaining unamortized discount was $0.4 million. The effective interest rate on the term loan was 3.79% on December 31, 2013. The interest rate was based on the 6-month adjusted LIBOR (London Interbank Offered Rate) plus 2.5%. Mandatory additional principal prepayments could have been required based on excess cash flows of the Company. The Company’s excess cash flows, as defined in the credit facility, for 2013 triggered a contractual principal prepayment obligation of $48.5 million, which has been classified as a current liability as of December 31, 2013. Concurrent with the close of the IPO in July 2014, the Company repaid, in full, the term loan outstanding of $108.0 million, and recorded the remaining deferred issuance costs and debt discount of $0.6 million related to the term loan as interest expense.
	The revolving credit facility contractually matured on December 21, 2016. As of December 31, 2013, zero of the revolving credit facility had been drawn down and $20.0 million was committed to a standby letter of credit. In April 2014, the $20.0 million standby letter of credit was terminated. In August 2014, the Company terminated the revolving credit facility and recorded the remaining deferred issuance costs of $0.5 million related to the revolving credit facility as interest expense.
	The credit agreement contains customary representations and warranties and customary affirmative and negative covenants applicable to the Company and its restricted subsidiaries, including, among other things, restrictions on indebtedness, liens, investments, mergers, dispositions, prepayment of other indebtedness and dividends and other distributions. The credit agreement contains an acceleration clause for certain events related to the Company’s financial creditworthiness, including a financial covenant that requires the Company to maintain specific consolidated ratios. As of December 31, 2013, the Company was in compliance with all covenants.

Income_taxes

Income taxes	12 Months Ended
	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Income taxes	Income taxes
	Income before income tax consisted of the following:
		Years ended December 31,
	(in thousands)	2014				2013				2012
	Domestic	$	114,937			$	57,251			$	38,714
	Foreign	66,038				34,078				14,496
		$	180,975			$	91,329			$	53,210
	Income tax expense consisted of the following:
		Years ended December 31,
	(in thousands)	2014				2013				2012
	Current:
	Federal	$	55,846			$	28,856			$	19,984
	State	6,075				1,634				-493
	Foreign	8,219				8,058				3,578
	Total current	70,140				38,548				23,069
	Deferred:
	Federal	(13,551		)		-7,268				-2,247
	State	(3,369		)		-861				126
	Foreign	(333		)		332				—
	Total deferred	(17,253		)		-7,797				-2,121
	Income tax expense	$	52,887			$	30,751			$	20,948
	Undistributed earnings of $96.2 million of the Company’s foreign subsidiaries are considered to be indefinitely reinvested and, accordingly, no provision for federal and state income taxes have been provided thereon. The Company intends to reinvest these earnings indefinitely in its foreign subsidiaries. If these earnings were distributed to the United States in the form of dividends or otherwise or if the shares of the relevant foreign subsidiaries were sold or otherwise transferred the Company would be subject to additional U.S. income taxes (subject to adjustment for foreign tax credits) and foreign withholding taxes. Determination of the amount of unrecognized deferred income tax liability related to these earnings is not practical.
	Income tax expense reconciles to the amount computed by applying the federal statutory rate (35%) to income before income taxes as follows:
		Years ended December 31,
		2014						2013					2012
	(in thousands, except percentage)	$			%			$			%		$			%
	Reconciliation to statutory rate:
	Tax at federal statutory rate	$	63,341		35	%		$	31,965		35	%	$	18,623		35	%
	State taxes, net of federal benefit	4,911			2.7			2,344			2.6		1,384			2.6
	Impact of foreign operations	(13,305		)	(7.4	)		(113		)	(0.1	)	(211		)	(0.4	)
	Stock-based compensation	8,050			4.4			2,982			3.3		1,385			2.6
	Tax credits	(10,616		)	(5.9	)		(5,637		)	(6.2	)	(415		)	(0.8	)
	Other	506			0.4			(790		)	(0.9	)	182			0.4
		$	52,887		29.2	%		$	30,751		33.7	%	$	20,948		39.4	%
	Deferred income taxes reflect the net tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes. Significant components of the Company’s deferred tax assets and liabilities were as follows:
		December 31,
	(in thousands)	2014				2013
	Components of deferred tax assets and liabilities
	Deferred tax assets:
	Net operating loss carryforwards	$	—			$	252
	Tax credit carryforwards	2,347				—
	Stock-based compensation	9,950				3,475
	Accruals and reserves	23,950				15,463
	Total deferred tax assets	$	36,247			$	19,190
	Deferred tax liabilities:
	Depreciation and amortization	$	(3,418	)		$	(3,063	)
	Intangible assets	—				(550		)
	Total deferred tax liabilities	(3,418		)		(3,613		)
	Net deferred tax assets	$	32,829			$	15,577
	Recognition of deferred tax assets is appropriate when realization of such assets is more likely than not. Based upon the weight of available evidence, which includes the Company’s historical operating performance and the U.S. cumulative net profits in prior periods, the Company believes it is more likely than not that deferred tax assets will be realized.
	As of December 31, 2014, the Company’s federal and state net operating loss carryforwards for income tax purposes were $0.4 million and $10.1 million, respectively, and state tax credit carryforwards were approximately $6.2 million. All of the Company's federal and state loss carryforwards and $2.6 million of the state tax credit carryforwards will be recorded to additional paid-in capital when realized. If not utilized, the federal and state losses will begin to expire from 2019 to 2034, while the state tax credits may be carried forward indefinitely. If certain substantial changes in the entity's ownership occur, there could be an annual limitation on the amount of the carryforwards that can be utilized.
	On December 19, 2014, The Tax Increase Prevention Act of 2014 was signed into law, which retroactively reinstated the federal research tax credit provisions from January 1, 2014 through December 31, 2014. As a result, the Company recognized an income tax benefit of $6.6 million for federal research and development tax credits.
	Uncertain income tax positions
	The Company has adopted ASC 740-10 “Accounting for Uncertainty in Income Taxes.” ASC 740-10 prescribes a recognition threshold and measurement attribute for the financial statement recognition and measurement of uncertain tax positions taken or expected to be taken in the Company’s income tax return, and also provides guidance on derecognition, classification, interest and penalties, accounting in interim periods, disclosure and transition.
	The Company’s total amounts of gross unrecognized tax benefits as of December 31, 2014 was $16.6 million, which represented an increase in unrecognized tax benefits by $6.7 million during 2014. If recognized, $15.5 million of these unrecognized tax benefits (net of federal benefit) would be recorded as a reduction of future income tax provision for the year ending December 31, 2014.
	A reconciliation of the beginning and ending amount of the unrecognized income tax benefits during the years ended December 31, 2014 and 2013 are as follows:
		December 31,
	(in thousands)	2014				2013				2012
	Gross balance at January 1	$	9,898			$	4,439			$	966
	Gross increase related to current year tax positions	6,401				5,280				3,473
	Gross increase related to prior year tax positions	259				179				—
		$	16,558			$	9,898			$	4,439
	The Company’s policy is to account for interest and penalties as income tax expense. As of the December 31, 2014, the Company had accrued interest and penalties of approximately $0.2 million related to unrecognized tax benefits. There was no accrued interest or penalties as of December 31, 2013 and 2012.
	It is reasonably possible that the total amounts of unrecognized tax benefits will significantly increase within the next 12 months. However, the range of the reasonably possible change cannot be reliably estimated.
The Company files income tax returns in the U.S. and certain non-U.S. jurisdictions. The Company is subject to U.S. federal income tax examination for calendar tax years ending 2012 through 2014, from 2010 through 2014 for state tax purposes, from 2013 through 2014 for Hong Kong and 2014 for the Netherlands. The U.S. federal and U.S. state taxing authorities may choose to audit tax returns for tax years beyond the statute of limitation period due to significant tax attribute carryforwards from prior years, making adjustments only to carryforward attributes.
The Company is currently under examination by the California Franchise Tax Board for the 2011 and 2012 tax years. At this time, the Company is not able to estimate the potential impact that the examination may have on income tax expense. If the examination is resolved unfavorably, it may have a material negative impact on the Company's results of operations. During 2014, the Company completed an audit by the Internal Revenue Service for the 2011 tax year which included a partial year S corporation and partial year C corporation return. The resolution of this examination did not have a material impact on income tax expense.

Related_parties

Related parties	12 Months Ended
	Dec. 31, 2014
Related Party Transactions [Abstract]
Related parties	Related parties
	Beginning in fiscal year 2013, the Company entered into agreements for certain contract manufacturing and engineering services with a company affiliated with one of its investors. During the years ended December 31, 2014 and 2013, the Company made payments of $12.2 million and $3.6 million, respectively, for services rendered. As of December 31, 2014 and 2013, the Company had accounts payable associated with this vendor of $0.1 million and $3.9 million, respectively.
	In the second quarter of 2013, the Company settled an outstanding legal matter with one of the CEO’s family members for $0.2 million.
	In the second quarter of 2013, the Company loaned one of its executive officers $150,000 pursuant to a demand payment loan that did not bear interest, which was fully repaid in March 2014.
	In the third quarter of 2013, the Company entered into an agreement with a company affiliated with the son of one of the members of the Board to acquire certain naming rights to a sprint kart race track. As consideration for these naming rights, the Company will pay a total of $0.5 million in installments beginning in October 2013 over the naming rights period. In addition to the fee, the Company will also provide the company with 100 GoPro capture devices at no cost each year during the term of the agreement, which is three years. As of December 31, 2014, the Company has paid $0.3 million related to this agreement.
	During the years ended December 31, 2014 and 2013, the Company incurred and expensed chartered aircraft fees for the use of the CEO’s private plane, for which $0.5 million was paid during the year ended December 31, 2014 and $0.4 million was accrued as of December 31, 2014.
	In May 2014, the Company amended the outstanding stock options granted to the former Chief Financial Officer to facilitate the net exercise of those options and subsequently repurchased 41,154 shares of common stock from the former Chief Financial Officer’s estate at a purchase price of $18.40 per share.
	In June 2014, the CEO purchased seven automobiles from the Company for a total purchase price of $0.3 million, which was equal to the deemed fair value of the automobiles purchased.

Commitments_contingencies_and_

Commitments, contingencies and guarantees	12 Months Ended
	Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract]
Commitments, contingencies and guarantees	Commitments, contingencies and guarantees
	The following table summarizes the Company’s contractual commitments as of December 31, 2014:
	(in thousands)	Total		1 year		2-3 years		4-5 years		More than
				(fiscal		(fiscal		(fiscal		5 years
				2015)		2016 and 2017		2018 and		(beyond
								2019)		fiscal
										2019)
	Operating leases(1)	$	37,557	$	9,698	$	18,644	$	9,215	$	—
	Sponsorship commitments(2)	13,858		8,743		5,115		—		—
	Other contractual commitments(3)	7,395		2,899		4,496		—		—
	Capital equipment purchase commitments(4)	16,021		16,021		—		—		—
	Total contractual cash obligations	$	74,831	$	37,361	$	28,255	$	9,215	$	—
	-1	The Company leases its facilities under long-term operating leases, which expire at various dates through May 2019. The lease agreements frequently include leasehold improvement incentives, escalating lease payments, renewal provisions and other provisions which require the Company to pay taxes, insurance, maintenance costs or defined rent increases.
	-2	The Company sponsors sporting events, resorts and athletes as part of its marketing efforts. In many cases, the Company enters into multi-year agreements with event organizers, resorts and athletes.
	-3	In 2013, the Company purchased software licenses and engaged outside consultants to assist with upgrading or implementing its financial and IT systems, which require payments over multiple years.
	-4	The Company enters into contracts to acquire equipment for tooling and molds as part of its manufacturing operations. In addition, the Company incurs purchase commitments related to the manufacturing of its POP displays by third parties.
	Rent expense for the years ended December 31, 2014, 2013 and 2012 was $7.3 million, $3.9 million, and $1.9 million, respectively.
	Legal proceedings
	From time to time, the Company is involved in legal proceedings in the ordinary course of business. The Company believes that the outcome of any existing litigation, either individually or in the aggregate, will not have a material impact on the results of operations, financial condition or cash flows of the Company.
	Indemnifications
	The Company has entered into indemnification agreements with its directors and executive officers which requires it to indemnify its directors and executive officers against liabilities that may arise by reason of their status or service. In addition, in the normal course of business, the Company enters into agreements that contain a variety of representations and warranties and provide for general indemnification. The Company’s exposure under these agreements is unknown because it involves claims that may be made against the Company in the future, but have not yet been made. To date, the Company has not paid any claims or been required to defend any action related to its indemnification obligations. However, the Company may record charges in the future as a result of these indemnification obligations.
	Product warranty
	As of December 31, 2014, $6.0 million of the warranty liability was recorded as an element of accrued liabilities and $0.4 million was recorded as an element of other long-term liabilities.
	The following table summarizes the warranty liability activity:
		Years ended December 31,
	(in thousands)	2014		2013		2012
	Beginning balances	$	3,870	$	1,937	$	589
	Charged to cost of revenue	10,268		7,380		2,821
	Settlements of warranty claims	-7,733		-5,447		-1,473
	Ending balances	$	6,405	$	3,870	$	1,937

Employee_retirement_plan

Employee retirement plan	12 Months Ended
	Dec. 31, 2014
Compensation and Retirement Disclosure [Abstract]
Employee retirement plan	Employee retirement plan
	The Company has a 401(k) defined contribution retirement plan (Retirement Plan) covering U.S. full-time employees. The Retirement Plan provides for voluntary employee contributions from 1% to 86% of annual compensation, subject to a maximum limit allowed by Internal Revenue Service guidelines.
	In March 2014, the Company modified its Retirement Plan to include an employer matching contribution. The matching contribution was retroactive to January 1, 2014. The matching contribution from the Company is equal to the employee’s 401(k) deferral up to 4% of their 401(k) eligible compensation per pay period.

Concentrations_of_risk_and_seg

Concentrations of risk and segment information	12 Months Ended
	Dec. 31, 2014
Risks and Uncertainties [Abstract]
Concentrations of risk and segment information	Concentrations of risk and segment information
	Segment information
	The Company operates as one operating segment as it reports financial information on an aggregate and consolidated basis to its CEO, who is the Company's chief operating decision maker.
	Customer concentration
	Financial instruments, which potentially subject the Company to concentrations of credit risk, consist principally of trade receivables. The Company believes that the credit risk in its trade receivables is mitigated by the Company’s credit evaluation process, relatively short collection terms and dispersion of its customer base. The Company generally does not require collateral and losses on trade receivables have historically been within management’s expectations.
	As of December 31, 2014 and 2013, the Company had the following customers who represented 10% or more of its net accounts receivable balance:
		Years ended December 31,
		2014		2013
	A (distributor)	17	%	14	%
	B (retailer)	14	%	*
	C (retailer)	11	%	11	%
	D (retailer)	*		21	%
	During the years ended December 31, 2014 and 2013, the Company sold accounts receivables, without recourse, of $250.4 million and $71.1 million, respectively, from a customer to a third-party banking institution. Factoring fees of $2.1 million and $0.6 million during the years ended December 31, 2014 and 2013, respectively, related to the sale of trade accounts receivable were included in other expense, net.
	The Company had one customer with revenue equal to or greater than 10% of total revenue for the years ended December 31, 2014, 2013, and 2012, as shown in the table below:
		Years ended December 31,
		2014		2013			2012
	A (retailer)	20	%	17	%		15	%
	*	Less than 10% of total revenue for the period indicated
	Supplier concentration
	The Company relies on third parties for the supply and manufacture of its capture devices. In instances where a supply and manufacture agreement does not exist or suppliers fail to perform their obligations, the Company may be unable to find alternative suppliers or satisfactorily deliver its products to its customers on time, if at all.
	The Company also relies on third parties with whom it outsources supply chain activities related to inventory warehousing, order fulfillment, distribution and other direct sales logistics. The Company cannot provide assurance that these parties will perform their obligations per the contractual terms or that any cost savings, or other benefits will be derived from the efforts of these parties. If any of these parties breaches or terminates their agreement with the Company or otherwise fails to perform their obligations in a timely manner, the Company’s financial results may be adversely affected.
	Geographic and other information
	Revenue by geographic region, based on ship-to destinations, was as follows:
		Year ended December 31,
	(in thousands)	2014			2013				2012
	Americas	$	890,352		$	557,285			$	314,135
	Europe, Middle East and Africa (EMEA)	371,197			322,226				161,193
	Asia and Pacific area countries (APAC)	132,656			106,226				50,688
		$	1,394,205		$	985,737			$	526,016
	Revenue in the United States, which is included in the Americas geographic region, was $796.0 million, $498.5 million and $278.7 million for the years ended December 31, 2014, 2013 and 2012, respectively. During the year ended December 31, 2014, the Company reclassified four countries it had previously included in the APAC geographical region to now be included in the EMEA geographical region. This caused $19.3 million, $10.6 million and $3.6 million of revenue to be reclassified from the APAC region to the EMEA region.
	As of December 31, 2014 and 2013 long-lived assets, which represent property and equipment, located outside the United States, primarily China, were $25.4 million and $6.0 million, respectively.
	The Company does not disclose revenue by product category as it does not track sales incentives and other revenue adjustments by product category to report such data.

Acquisitions

Acquisitions	12 Months Ended
	Dec. 31, 2014
Business Combinations [Abstract]
Acquisitions	Acquisitions
	On October 18, 2013, the Company completed the acquisition of 100% of the shares of General Things, a leading digital design and software studio based in San Francisco, California for aggregate acquisition consideration of $17.0 million, comprised of $10.0 million of cash and $7.0 million related to 430,000 shares of the Company’s common stock. The cash consideration includes retention bonuses of $1.7 million and the shares of the Company’s common stock includes 322,500 unvested stock awards. The acquisition is expected to advance the Company’s business back-end and consumer-facing web development.
	Of the aggregate acquisition consideration, approximately $10.1 million was determined to be the accounting purchase price attributable to the portion of cash and common stock for which there is no remaining requisite service period. The Company expects to record $6.9 million as compensation expense over the requisite service periods following the acquisition.
	The Company also recorded acquisition-related transaction costs of $0.3 million, which were included in general and administrative expenses during the year ended December 31, 2013.
	The Company has calculated the fair value of the tangible and intangible assets acquired to allocate the purchase price as of the acquisition date. The excess of purchase price over the aggregate fair values was recognized as goodwill. The purchase price of the transaction was allocated as follows:
	(in thousands)	Estimated	Purchase
		useful life	price
		(in years)
	Purchased intangible asset:
	Noncompete agreements	2	$	161
	Goodwill (non-tax deductible)		9,862
	Other assets and liabilities acquired, net of cash		84
	Total assets acquired		$	10,107
	The fair value of the intangible asset was determined using the income approach with significant inputs that are not observable in the market. Key assumptions included expected future cash flows and discount rates consistent with the assessment of risk. The purchased intangible asset will be amortized using a straight-line amortization method over its estimated useful lives. Among the factors that contributed to a purchase price in excess of the fair value of the net tangible and intangible assets were the synergies in products that can be leveraged by the Company and the acquisition of an assembled workforce of experienced software engineers.
	The results of operations of General Things are included in the accompanying Consolidated Statements of Operations from the date of acquisition. Pro forma results of operations for the General Things acquisition have not been presented because they are not material to the Company’s consolidated financial statements.

Basis_of_presentation_Policies

Basis of presentation (Policies)	12 Months Ended
	Dec. 31, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Principles of consolidation	Principles of consolidation
	These consolidated financial statements include all the accounts of the Company and its wholly-owned subsidiaries. Unless otherwise specified, references to the Company are references to the Company and its consolidated subsidiaries. All intercompany balances and transactions have been eliminated upon consolidation.
Use of estimates	Use of estimates
	The preparation of financial statements in accordance with accounting principles generally accepted in the United States of America (U.S. GAAP) requires management to make estimates and assumptions that affect the amounts reported and disclosed in the Company’s consolidated financial statements and accompanying notes. The Company bases its estimates and assumptions on historical experience and on various other factors that it believes to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. The actual results experienced by the Company may differ materially and adversely from management’s estimates. To the extent there are material differences between the estimates and the actual results, future results of operations will be affected.
Comprehensive income	Comprehensive income
Cash equivalents	Cash equivalents
	Cash equivalents consist of short-term, highly liquid financial instruments with immaterial interest rate risk that are readily convertible to cash and have maturities of three months or less from the date of purchase.
Marketable securities	Marketable securities
	Marketable securities consist of commercial paper, U.S. treasury securities, U.S. agency securities, and corporate debt securities, and are classified as available-for-sale securities. As the Company views these securities as available to support current operations, it has classified all available-for-sale securities as short-term. Available-for-sale securities are carried at fair value with unrealized gains and losses, if any, reported as a component of accumulated other comprehensive income in stockholders' equity, while realized gains and losses and other-than-temporary impairments, if any, are reported as a component of net income. As of December 31, 2014, the Company's marketable securities were recorded at their amortized cost which approximates fair value. An impairment charge is recorded in the Consolidated Statements of Operations for declines in fair value below the cost of an individual investment that is deemed to be other than temporary. The Company assesses whether a decline in value is temporary based on the length of time that the fair market value has been below cost, the severity of the decline and the intent and ability to hold or sell the investment.
Accounts receivable and allowance for doubtful accounts	Accounts receivable and allowance for doubtful accounts
	Accounts receivables are stated at invoice value less estimated allowances for returns and doubtful accounts. The Company continually monitors customer payments and maintains a reserve for estimated losses resulting from its customers’ inability to make required payments. The Company considers factors such as historical experience, credit quality, age of the accounts receivable balances, geographic related risks and economic conditions that may affect a customer’s ability to pay. In cases where there are circumstances that may impair a specific customer’s ability to meet its financial obligations, a specific allowance is recorded against amounts due, and thereby reduces the net recognized receivable to the amount reasonably believed to be collectible.
Inventories	Inventories
	Inventories consist of finished goods and component parts, which are purchased directly or from contract manufacturers. Inventories are stated at the lower of cost or market on a first-in, first-out basis. The Company’s assessment of market value requires the use of estimates regarding the net realizable value of its inventory balances, including an assessment of excess or obsolete inventories. The Company determines excess and obsolete inventories based on an estimate of the future demand for its products within a specified time horizon, generally 12 months. The estimates used for future demand are also used for near-term capacity planning and inventory purchases and are consistent with revenue forecast assumptions. If the Company’s demand forecast is greater than actual demand, the Company may be required to record an excess inventory charge, which would decrease gross profit. Any write-downs taken establish a new cost basis for the underlying inventory.
Point of purchase (POP) displays	Point of purchase (POP) displays
	The Company sponsors a program to provide retailers with POP displays in order to facilitate the marketing of the Company’s products within retail stores. The POP displays contain a video display that broadcast video images taken by GoPro cameras with product placement available on the POP display for cameras and accessories. The Company generally provides these POP displays to customers free of charge. The costs of the POP displays, less any fees charged to customers, are capitalized as a long-term asset on the accompanying Consolidated Balance Sheets, and the net cost is recognized over the expected period of the benefit provided by these assets, which generally ranges from 24 to 36 months.
Property and equipment, net	Property and equipment, net
	Property and equipment are stated at cost and are depreciated using the straight-line method over the estimated useful life of the assets, ranging from one to seven years. Leasehold improvements are stated at cost and amortized over the shorter of the lease term or the expected useful life of the improvements. Property and equipment pending installation, configuration or qualification are classified as construction in progress.
Fair value measurements	Fair value measurements
	The Company categorizes the fair value of its financial assets according to the hierarchy established by the FASB, which prioritizes the inputs to valuation techniques used to measure fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurements) and the lowest priority to unobservable inputs (Level 3 measurements). The three levels of the fair value hierarchy are:
	Level 1	Valuations based on quoted prices in active markets for identical assets or liabilities that the Company has the ability to directly access.
	Level 2	Valuations based on quoted prices for similar assets or liabilities; valuations for interest-bearing securities based on non-daily quoted prices in active markets; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable data for substantially the full term of the assets or liabilities.
	Level 3	Valuations based on inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities.
	A financial instrument’s level within the fair value hierarchy is based on the lowest level of any input that is significant to the fair value measurement. In circumstances in which a quoted price in an active market for the identical liability is not available, the Company is required to use the quoted price of the identical liability when traded as an asset, quoted prices for similar liabilities, or quoted prices for similar liabilities when traded as assets. If these quoted prices are not available, the Company is required to use another valuation technique, such as an income approach or a market approach.
Leases	Leases
	The Company leases its facilities under cancelable and non-cancelable operating leases. For leases that contain rent escalation or rent concession provisions, the Company records the total rent expense on a straight-line basis over the term of the lease. The Company records the difference between the rent paid and the straight-line rent as a deferred rent liability on the accompanying Consolidated Balance Sheets. Leasehold improvements are included in property and equipment, net.
Goodwill, acquired intangible assets and other long-lived assets	Goodwill, acquired intangible assets and other long-lived assets
	Goodwill represents the excess of the purchase price over the fair value of the net tangible and intangible assets acquired in a business combination. Goodwill is not amortized but the Company performs an annual qualitative assessment of its goodwill during the fourth quarter of each calendar year to determine if any events or circumstances exist, such as an adverse change in business climate or a decline in the overall industry demand, that would indicate that it would more likely than not reduce the fair value of a reporting unit below its carrying amount, including goodwill. If events or circumstances do not indicate that the fair value of a reporting unit is below its carrying amount, then goodwill is not considered to be impaired and no further testing is required. If further testing is required, the Company performs a two-step process. The first step involves comparing the fair value of the Company’s reporting unit to its carrying value, including goodwill. If the carrying value of the reporting unit exceeds its fair value, the second step of the test is performed by comparing the carrying value of the goodwill in the reporting unit to its implied fair value. An impairment charge is recognized for the excess of the carrying value of goodwill over its implied fair value. For the purpose of impairment testing, the Company has determined that it has one reporting unit. There has been no impairment of goodwill for any periods presented.
	The Company’s long-lived assets consist of property and equipment and acquired intangible assets. Acquired intangible assets with definite lives are amortized on a straight-line basis over the remaining estimated economic life of the underlying products and technologies. The Company reviews its definite-lived long-lived assets for impairment whenever events or changes in circumstances indicate that the carrying amount of a long-lived asset may not be recoverable. Recoverability of an asset group is measured by comparing its carrying amount to the expected future undiscounted cash flows that the asset group is expected to generate. If it is determined that an asset group is not recoverable, an impairment loss is recorded in the amount by which the carrying amount of the asset group exceeds its fair value.
Warranty	Warranty
	The Company generally provides 12-month warranty coverage on all of its products except in the European Union where the Company provides a two-year warranty. The Company’s warranty provides for repair or replacement of the associated products during the warranty period. The Company establishes a liability for estimated product warranty costs at the time product revenue is recognized. The warranty obligation is affected by product failure rates and the related use of materials, labor costs and freight incurred in correcting any product failure. Should actual product failure rates, use of materials, or other costs differ from the Company’s estimates, additional warranty liabilities could be required, which would reduce its gross profit.
Revenue recognition	Revenue recognition
	Revenue is primarily comprised of product revenue, net of returns and sales incentives.
	Revenue is primarily derived from the sale of capture devices, as well as the related implied post contract support (PCS). The Company recognizes revenue when persuasive evidence of an arrangement exists, delivery has occurred, the sales price is fixed or determinable and collectability is reasonably assured. Evidence of an arrangement consists of an order from its distributors, resellers or online customers. The Company considers delivery to have occurred once title and risk of loss has been transferred. Customer deposits are included in accrued liabilities on the accompanying Consolidated Balance Sheets and are recognized as revenue when all the criteria for recognition of revenue are met.
	The Company’s standard terms and conditions of sale for its non-web-based sales do not allow for product returns and it generally does not allow product returns other than under warranty. However, the Company grants limited rights to return product for certain large retailers and distributors. Estimates of expected future product returns are recognized at the time of sale based on analyses of historical return trends by customer class. Upon recognition, the Company reduces revenue and cost of sales for the estimated return. Return trends are influenced by product life cycle status, new product introductions, market acceptance of products, sales levels, product sell-through, the type of customer, seasonality, product quality issues, operational policies and procedures, and other factors. Return rates can fluctuate over time, but are sufficiently predictable to allow the Company to estimate expected future product returns.
	For customers who purchase products directly from the Company’s website, transfer of risk of loss is determined to be upon delivery to the customer’s address. The Company defers those sales made to customers who purchase products from its website during a fixed time frame prior to the end of the reporting period for which the Company estimates delivery to occur in the following period. The Company uses estimates to determine when shipments are delivered based on third-party metrics for average transit time. Additionally, the Company provides a 30-day money back guarantee for web-based sales for which the Company reduces revenue by an estimate of potential future product returns related to the web-based sales, based on analyses of historical return trends and seasonality. Estimates for web-based sale returns and estimates to derive web sale shipment delivery dates may differ from actual results.
	The Company’s camera products include multiple elements. Each element in a multiple element arrangement must be evaluated to determine whether it represents a separate unit of accounting. An element constitutes a separate unit of accounting when it has standalone value and delivery of an undelivered element is both probable and delivery is within the Company’s control.
	The Company has determined its multiple element arrangements generally include two separate units of accounting: The first element is the hardware component (camera and accessories) and the embedded firmware essential to the functionality of the camera delivered at the time of sale. The second element is the implied right for the customer to receive post contract support included with the purchase of the Company’s camera products. PCS includes the right to receive, on a when and if available basis, future unspecified firmware upgrades and features as well as bug fixes, email and telephone support.
	The Company accounts for each element separately and allocate fees from the arrangement based on the relative selling price of each element. Revenue allocated to an undelivered element is recognized over an estimated service period. The Company recognizes revenue for delivered elements only when all contractual obligations have been completed.
	The Company uses a hierarchy to determine the allocation of revenue. The hierarchy is as follows: (i) vendor-specific objective evidence of fair value (VSOE), (ii) third-party evidence of selling price (TPE) and (iii) best estimate of the selling price (BESP).
	i.	VSOE generally exists only when a company sells a deliverable separately and is the price actually charged by the company for that deliverable. The Company does not sell its deliverables separately and, as such, do not have VSOE.
	ii.	TPE can be substantiated by determining the price that other parties sell similar or substantially similar offerings. The Company does not believe that there is accessible TPE evidence for similar deliverables since there are not comparable deliverables sold by other companies.
	iii.	BESP reflects the Company’s best estimates of what the selling prices of elements would be if they were sold regularly on a stand-alone basis. The Company believes that BESP is the most appropriate methodology for determining the allocation of revenue for its multiple element arrangements.
	The Company has allocated revenue between its two elements using the relative selling price method which is based on the BESP for all deliverables. Revenue allocated to the delivered hardware and the related essential software is recognized at the time of sale provided the conditions for recognition of revenue have been met. Revenue allocated to PCS is deferred and recognized on a straight-line basis over the estimated term of the support period, which is estimated to be one year based on historical experience. As of December 31, 2014, and 2013, deferred implied PCS revenue was $11.6 million and $6.4 million, respectively.
	The Company’s process for determining the BESP for its deliverables involves multiple factors that may vary depending upon the unique facts and circumstances related to each deliverable. Key factors considered by the Company in developing the BESP for PCS include evaluating the level of support provided to customers and analyzing the amount of time and cost that is allocated to the Company’s efforts to develop the undelivered elements, determining the cost of its support efforts, and then adding an appropriate level of gross profit to these costs.
Sales incentives	Sales incentives
	The Company offers sales incentives through various programs, consisting primarily of cooperative advertising and marketing development fund programs. The Company records cooperative advertising and marketing development fund programs with customers as a reduction to revenue unless it receives an identifiable benefit in exchange for credits claimed by the customer and can reasonably estimate the fair value of the identifiable benefit received, in which case the Company will record it as a marketing expense. In addition, the Company offers price protection discounts to certain customers when new capture device models are released and the customer has remaining inventory on hand of the older capture device model. The Company estimates price protection discounts, which are recorded as a reduction of revenue, by evaluating inventory currently held by the customer subject to price protection. The Company records reductions to revenue for sales incentives when the related revenue is recognized.
Cost of revenue	Cost of revenue
	Cost of revenue includes actual product cost, the cost of shipping, depreciation and amortization, warehousing and processing inventory, warranty replacement costs, excess and obsolete inventory write-downs, certain allocated costs and license fees paid to third parties.
Shipping costs	Shipping costs
	The Company records amounts billed to customers for shipping costs as revenue in the accompanying Consolidated Statements of Operations. The Company classifies related shipping and handling costs incurred as cost of revenue in the accompanying Consolidated Statements of Operations.
Deferred revenue	Deferred revenue
	Deferred revenue is comprised of customer deposits, undelivered post contract support and undelivered web sale shipments. The cost of revenue related to deferred web sales is included in inventory.
Research and development	Research and development
	Research and development expense includes internal and external costs. Internal costs include employee related expenses, equipment costs, depreciation expense and allocated facility costs. External research and development expenses consist of costs associated with consultants, tooling and prototype materials.
	Substantially all research and development expense is related to new research and development efforts and the designing of significant improvements to existing products. Research and development expense to establish the technological feasibility of the Company’s internally developed software is expensed as incurred.
Advertising costs	Advertising costs
	Advertising costs consist of costs associated with print, television and ecommerce media advertisements and are expensed as incurred. A significant amount of the Company’s promotional expenses result from payments under event, resort and athlete sponsorship contracts. Accounting for sponsorship payments is based upon specific contract provisions. These sponsorship arrangements are considered to be executory contracts and, as such, the costs are recognized as performance under the contract is received. The costs associated with preparation of sponsorship activities, including the supply of GoPro products, media team support and activation fees are considered costs of producing advertising and are expensed as incurred. Prepayments made under sponsorship agreements are included in prepaid expenses or other assets depending on the period to which the prepayment applies.
Stock-based compensation	Stock-based compensation
	The Company accounts for stock-based compensation activity using the fair value recognition and measurement provisions of GAAP. These provisions require the all share-based payments to employees, including grants of stock options, restricted stock units (RSUs), restricted stock awards (RSAs) and purchases under the Company's Employee Stock Purchase Plan (ESPP), to be measured based on the grant-date fair value of the awards, with the resulting expense generally recognized over the period during which the employee is required to perform service in exchange for the award. The fair value of each stock option granted is estimated using the Black-Scholes option pricing model. The fair value of service-based RSUs and RSAs granted represents the closing price of the Company's common stock on the date of grant. The fair value of stock-based awards with market and service conditions are estimated using a Monte Carlo valuation model. The fair value of purchases under the Company's ESPP is calculated based on the closing price of the Company's common stock on the date of grant. For service-based awards, stock-based compensation is recognized on a straight-line basis over the requisite service period, net of estimated forfeitures. The forfeiture rate is based on an analysis of the Company's actual historical forfeitures. For performance and market-based awards which also require a service period, the Company uses graded vesting over the longer of the derived service period or when the performance or market condition is satisfied.
	The Company accounts for stock options and restricted stock issued to nonemployees based on the fair value of the awards determined using the Black-Scholes option pricing model. The fair value of awards granted to nonemployees is re-measured as the awards vest, and the resulting change in fair value, if any, is recognized in the Company's Consolidated Statement of Operations during the period the related services are rendered.
	The Company recognizes a benefit from stock-based compensation as additional paid-in capital if an incremental tax benefit is realized by following the with-and-without approach. In addition, the indirect effects of stock-based compensation deductions are reflected in the income tax provision for purposes of measuring the excess tax benefit at settlement of awards.
Sales taxes	Sales taxes
	Sales taxes collected from customers and remitted to respective governmental authorities are not included in revenue and are reflected as a liability on the accompanying Consolidated Balance Sheets.
Foreign currency	Foreign currency
	The Company and the Company’s wholly-owned subsidiaries use the U.S. dollar as their functional currency. Local currency transactions of the Company’s international operations are remeasured into U.S. dollars at the rates of exchange in effect at the date of the transaction. For those wholly-owned subsidiaries with assets or liabilities denominated in currencies other than the U.S. dollar, non-monetary assets are remeasured into U.S. dollars using historical rates of exchange. Monetary assets and liabilities are remeasured into U.S. dollars using exchange rates prevailing on the balance sheet date.
Income taxes	Income taxes
	The Company utilizes the asset and liability method of accounting for income taxes which requires the recognition of deferred tax assets and liabilities for expected future consequences of temporary differences between the financial reporting and income tax bases of assets and liabilities using enacted tax rates. Management makes estimates, assumptions and judgments to determine the Company’s provision for income taxes and also for deferred tax assets and liabilities, and any valuation allowances recorded against the Company’s deferred tax assets. The Company assesses the likelihood that its deferred tax assets will be recovered from future taxable income and, to the extent the Company believes that recovery is not likely, the Company must establish a valuation allowance.
	The calculation of the Company’s current provision for income taxes involves the use of estimates, assumptions and judgments while taking into account current tax laws, interpretation of current tax laws and possible outcomes of future tax audits. The Company has established reserves to address potential exposures related to tax positions that could be challenged by tax authorities. Although the Company believes its estimates, assumptions and judgments to be reasonable, any changes in tax law or its interpretation of tax laws and the resolutions of potential tax audits could significantly impact the amounts provided for income taxes in the Company’s consolidated financial statements.
	The calculation of the Company’s deferred tax asset balance involves the use of estimates, assumptions and judgments while taking into account estimates of the amounts and type of future taxable income. Actual future operating results and the underlying amount and type of income could differ materially from the Company’s estimates, assumptions and judgments thereby impacting the Company’s financial position and results of operations.
	The Company has adopted ASC 740-10 “Accounting for Uncertainty in Income Taxes” that prescribes a recognition threshold and measurement attribute for the financial statement recognition and measurement of uncertain tax positions taken or expected to be taken in the Company’s income tax return, and also provides guidance on derecognition, classification, interest and penalties, accounting in interim periods, disclosure and transition.
	The Company includes interest and penalties related to unrecognized tax benefits within income tax expense in the accompanying Consolidated Statements of Operations.
Recent accounting pronouncements	Recent accounting pronouncements
	On May 28, 2014, the Financial Accounting Standards Board (FASB) issued a new accounting standard update on revenue from contracts with customers, which supersedes the revenue recognition requirements in Topic 605, Revenue Recognition, and most industry-specific guidance throughout the Industry Topics of the Codification. The new guidance adheres to the core principle that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. To achieve this principle, the new guidance lists five steps that entities should follow, including identifying the contract with a customer, identifying the performance obligations in the contract, determining the transaction price, allocating the transaction price to the performance obligations in the contract and recognizing revenue when the entity satisfies a performance obligation. The new guidance becomes effective for the Company on January 1, 2017, with retrospective application permitted. Early application is not permitted. The Company is currently assessing the impact of this new guidance.
	In June 2014, the FASB issued a new accounting standard update on the accounting for share-based payments when the terms of an award provide that a performance target could be achieved after the requisite service period. The amendments require that a performance target that affects vesting and that could be achieved after the requisite service period is treated as a performance condition. Compensation cost should be recognized in the period in which it becomes probable that the performance target will be achieved and should represent the compensation cost attributable to the period(s) for which the requisite service has already been rendered. The new guidance becomes effective for the Company on January 1, 2016, with early adoption permitted. The Company does not believe the adoption of this guidance will have a material impact on its consolidated financial statements.
	In August 2014, the FASB issued new guidance related to the disclosures around going concern. The new standard update provides guidance around management's responsibility to evaluate whether there is substantial doubt about an entity's ability to continue as a going concern and to provide related footnote disclosures. The new guidance is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2016. Early adoption is permitted. The Company does not believe the adoption of this guidance will have a material impact on its consolidated financial statements.

Fair_value_measurements_Tables

Fair value measurements (Tables)	12 Months Ended
	Dec. 31, 2014
Fair Value Disclosures [Abstract]
Fair Value, Assets Measured on Recurring Basis	The Company’s assets that are measured at fair value on a recurring basis, by level, within the fair value hierarchy as of December 31, 2014 are summarized as follows:
		December 31, 2014
	(in thousands)	Level 1		Level 2		Level 3		Total
	Cash equivalents:
	Money market funds	$	80,968	$	—	$	—	$	80,968
	Corporate debt securities	—		2,000		—		2,000
	Total cash equivalents	$	80,968	$	2,000	$	—	$	82,968
	Marketable securities:
	U.S. treasury securities	$	1,994	$	—	$	—	$	1,994
	U.S. agency securities	—		7,020		—		7,020
	Commercial paper	—		2,497		—		2,497
	Corporate debt securities	—		90,816		—		90,816
	Total marketable securities	$	1,994	$	100,333	$	—	$	102,327

Balance_sheet_components_Table

Balance sheet components (Tables)	12 Months Ended
	Dec. 31, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Cash, Cash Equivalents and Marketable Securities	Cash, cash equivalents and marketable securities consist of the following:
		December 31,
	(in thousands)	2014				2013
	Cash and cash equivalents:
	Cash	$	236,961			$	101,410
	Money market funds	80,968
	Corporate debt securities	2,000				—
	Cash and cash equivalents	$	319,929			$	101,410
	Marketable securities:
	Commercial paper	$	2,497			$	—
	U.S. treasury securities	1,994				—
	U.S. agency securities	7,020				—
	Corporate debt securities	90,816				—
	Marketable securities	$	102,327			$	—
Schedule of Inventory	Inventories, net consisted of the following:
		December 31,
	(in thousands)	2014				2013
	Components	$	4,324			$	8,000
	Finished goods	148,702				103,994
	Inventories, net	$	153,026			$	111,994
Prepaid Expenses and Other Current Assets	Prepaid expenses and other current assets consisted of the following:
		December 31,
	(in thousands)	2014				2013
	Prepaid income taxes	$	26,504			$	—
	Current deferred tax assets	24,218				15,173
	Prepaid expenses	3,905				2,739
	Prepaid licenses	2,053				1,091
	Deposits	1,244				2,049
	Other current assets	5,845				915
	Prepaid expenses and other current assets	$	63,769			$	21,967
Property and Equipment, Net	Property and equipment, net consisted of the following;
		Useful life		December 31,
	(in thousands)	(in years)		2014				2013
	Leasehold improvements	3–7		$	22,787			$	20,111
	Computers, software, equipment and furniture	2–4		24,636				11,988
	Tooling	1–4		16,159				8,799
	Construction in progress			3,944				2,151
	Tradeshow equipment	2–5		2,863				2,613
	Automobiles	3–5		967				856
	Gross property and equipment			71,356				46,518
	Less: Accumulated depreciation and amortization			(29,800		)		(14,407		)
	Property and equipment, net			$	41,556			$	32,111
Schedule of Goodwill	Goodwill at December 31, 2012, 2013 and December 31, 2014 was as follows:
	(In thousands)
	Goodwill at December 31, 2012	$	4,233
	Acquisition	9,862
	Goodwill at December 31, 2013	$	14,095
	Adjustments	—
	Goodwill at December 31, 2014	$	14,095
Intangible Assets	Acquired intangible assets at December 31, 2014, and 2013 were as follows:
		31-Dec-14										Weighted average remaining useful life
	(in thousands)	Gross				Accumulated				Net		(in years)
						amortization
	Developed technology	$	6,130			$	(3,427	)		$	2,703	2.4
	Tradename	664				(509		)		155		1.2
	Customer relationships	170				(170		)		—		0
	Noncompete agreements	311				(247		)		64		0.8
	Domain name	15				—				15
		$	7,290			$	(4,353	)		$	2,937
		31-Dec-13										Weighted
												average
												remaining
												useful life
	(in thousands)	Gross				Accumulated				Net		(in years)
						amortization
	Developed technology	$	5,330			$	(2,517	)		$	2,813	3.2
	Tradename	664				-376				288		2.2
	Customer relationships	170				-161				9		0.2
	Noncompete agreements	311				-166				145		1.8
	Domain name	15				—				15
		$	6,490			$	(3,220	)		$	3,270
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense	The estimated future amortization expense of acquired intangible assets to be charged to cost of revenue and operating expenses as of December 31, 2014, is as follows:
	(in thousands)	Cost of				Operating				Total
		revenue				expenses
	Years ending December 31,
	2015	$	888			$	464			$	1,352
	2016	888				289				1,177
	2017	149				244				393
		$	1,925			$	997			$	2,922
Other Long-term Assets	Other long-term assets consisted of the following:
		December 31,
	(in thousands)	2014				2013
	POP displays	$	18,743			$	22,379
	Long-term deferred tax assets	8,611				736
	Deposits	4,706				2,698
	Long-term licenses and other	4,000				4,000
	Deferred financing charges	—				947
	Deferred public offering costs	—				1,395
	Other long-term assets	$	36,060			$	32,155
Schedule of Accrued Liabilities	Accrued liabilities consisted of the following:
		December 31,
	(in thousands)	2014				2013
	Accrued payables	$	57,064			$	49,975
	Employee related liabilities	28,959				11,932
	Accrued sales incentives	9,635				4,909
	Warranty liability	6,025				3,691
	Customer deposits	4,903				1,316
	Sales commissions	4,254				2,454
	Other	4,935				12,114
	Accrued liabilities	$	115,775			$	86,391

Stockholders_equity_deficit_Ta

Stockholders' equity (deficit) (Tables)	12 Months Ended
	Dec. 31, 2014
Equity [Abstract]
Disclosure of Share-based Compensation Arrangements by Share-based Payment Award	The Company had the following shares of common stock reserved for issuance upon the exercise of equity instruments as of December 31, 2014 (in thousands):
	Stock options outstanding	25,134
	Restricted stock units outstanding	4,307
	Stock options, restricted stock and RSUs available for future grants	12,885
		42,326
Schedule of Share-based Compensation, Stock Options, Activity	A summary of the Company’s stock option activity and related information is as follows:
					Options outstanding
	(shares in thousands)	Shares			Shares			Weighted-				Weighted-			Total intrinsic		Weighted-	Aggregate
		available						average				average			value of		average	intrinsic value
		for grant						exercise				grant-			options		remaining	(in thousands)
								price				date fair			exercised		contractual
												value			(in thousands)		term
																	(in years)
	Outstanding at December 31, 2011:	400			26,361			$	0.8
	Additional shares authorized	2,100			—			—
	Granted	(1,418	)		1,418			5.1				$	5.02
	Exercised	—			-2,486			1.11							$	30,605
	Forfeited/Cancelled	891			-891			1.43
	Outstanding at December 31, 2012:	1,973			24,402			$	1								8.33	$	310,454
	Additional shares authorized	2,000
	Granted	-2,906			2,906			15.14				$	8.45
	Exercised	—			-345			2.23							$	4,564
	Forfeited/Cancelled	239			-239			6.31
	Outstanding at December 31, 2013:	1,306			26,724			$	2.47								7.55	$	367,395
	Additional shares authorized	21,970			—			—
	Granted	(5,208	)		5,208			21.68				$	11.51
	RSUs granted	(5,573	)		—			—
	Exercised	—			(6,419	)		1.24							$	253,332
	Forfeited/Cancelled	390			(379	)		12.11
	Outstanding at December 31, 2014:	12,885			25,134			$	6.62								7.09	$	1,425,339
	Exercisable at December 31, 2014				17,971			$	2								6.37	$	1,100,208
	Vested and expected to vest at				24,743			$	6.43								7.06	$	1,407,823
	31-Dec-14
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding and Exercisable	The following is a further breakdown of the options outstanding at December 31, 2014:
		Options outstanding								Options exercisable
	(shares in thousands)	Shares		Weighted-		Weighted-				Shares			Weighted-
		outstanding		average		average				exercisable			average
				remaining		exercise							exercise
				contractual		price							price
				life (in years)
	Range of exercise prices
	$    0.18–0.66	7,696		5.75		$	0.62			7,696			$	0.62
	0.76–0.76	7,769		6.46		0.76				7,572			0.76
	1.52–2.96	1,606		7.01		1.91				1,119			1.86
	8.30–8.30	462		7.7		8.3				244			8.3
	13.72–15.59	1,771		8.36		14.68				687			14.61
	16.19–16.39	2,466		9.06		16.26				368			16.21
	18.40–18.40	2,793		9.42		18.4				285			18.4
	38.84–81.50	571		9.65		54.9				—			—
	$  0.18–81.50	25,134		7.09		$	6.62			17,971			$	2
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity	A summary of the Company’s restricted stock and early-exercised stock options subject to repurchase activity is as follows:
	(in thousands except for weighted average grant date fair value)	Shares		Weighted-				Aggregate
				average				intrinsic
				grant date				value
				fair value
	Non-vested shares at December 31, 2011	644		$	2.44			$	711
	Vested	-212
	Non-vested shares at December 31, 2012	432		2.44				5,274
	Granted	430		16.19				6,962
	Vested	-375
	Non-vested shares at December 31, 2013	487		11.03				7,628
	Vested	-470
	Non-vested shares at December 31, 2014	17		$	6.3			$	1,017
Schedule of Share-based Compensation, Restricted Stock Units Award Activity	The following table summarizes the activities of the Company’s RSUs:
	(in thousands except for weighted average grant date fair value)	Shares			Weighted- average grant date fair value
	Non-vested shares at December 31, 2013 and 2012	270			$	1.52
	Granted	5,573			$	22.01
	Vested	(1,533	)		$	18.42
	Forfeited	(3	)		$	57.73
	Non-vested shares at December 31, 2014	4,307			$	21.98
Fair Value of Options Granted using Black-Scholes Option	The fair value of stock options granted was estimated as of the grant date using the assumptions listed in the following table:
		Years ended December 31,
		2014		2013		2012
	Volatility	54%–56%		56%–60%		56%–60%
	Expected term (years)	5.3–6.3		5.3–6.1		5.1–6.1
	Risk-free interest rate	1.7%–2.0%		0.8%–2.4%		0.8%–2.4%
	Dividend yield	—%		—%		—%
	Expected forfeiture rate	4%–6%		6%		5%-7%
	Weighted average fair value	$11.51		$8.45		$5.08
Schedule of Share-based Payment Award,, Valuation Assumptions	To estimate the fair value of the CEO RSUs subject to a market condition that were granted during the year ended December 31, 2014, the Company used a Monte Carlo valuation model with the following assumptions:
	Expected volatility	50.90%
	Expected term (years)	10
	Risk-free interest rate	2.69%
	Dividend yield	—%
	Grant date fair value of underlying shares	$18.40
Schedule of Share-based Payment Award, Equity Instruments Other Than Options, Valuation Assumptions [Table Text Block]	The following assumptions were used to calculate the fair value of stock purchase rights granted under the Company's ESPP during the year ended December 31, 2014:
	Volatility	45.50%
	Expected term (years)	0.6
	Risk-free interest rate	0.10%
	Dividend yield	—%
	Expected forfeiture rate	4%-6%
Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan	The following table summarizes stock-based compensation expense related to stock options, restricted stock and RSUs for the three years ended December 31, 2014, 2013 and 2012:
		Years ended December 31,
	(in thousands)	2014				2013				2012
	Stock-based compensation expense by type of award
	Stock options	$	17,450			$	8,468			$	8,165
	RSUs	41,412				—				—
	RSAs	10,833				2,419				991
	ESPP	1,704				—				—
	Total stock-based compensation expense	$	71,399			$	10,887			$	9,156
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs	The following table summarizes stock-based compensation expense as reported in the Company’s accompanying Consolidated Statements of Operations:
		Years ended December 31,
	(in thousands)	2014				2013				2012
	Cost of revenue	$	835			$	690			$	333
	Research and development	11,640				3,003				1,452
	Sales and marketing	10,428				5,670				6,335
	General and administrative	48,496				1,524				1,036
	Total stock-based compensation expense	71,399				10,887				9,156
	Total tax benefit recognized	-19,471				-1,104				-1,091
	Decrease in net income	$	51,928			$	9,783			$	8,065

Net_income_per_share_attributa1

Net income per share attributable to common stockholders (Tables)	12 Months Ended
	Dec. 31, 2014
Earnings Per Share [Abstract]
Schedule of Net Income per Share, Basic and Diluted	The following table presents the calculations of basic and diluted net income per share attributable to common stockholders:
		Year ended December 31,
	(in thousands, except per share amounts)	2014						2013			2012
		Class A			Class B			Common			Common
	Numerator:
	Allocation of net income	$	16,647		$	111,441		$	60,578		$	32,262
	Less: common stock distributed earnings	—			—			—			(84,828		)
	Less: preferred stock distributed earnings, including accumulated accretion	—			—			—			(26,927		)
	Less: unvested early exercised options and restricted stock distributed earnings	—			—			—			(454		)
	Less: undistributed earnings allocable to:
	holders of preferred stock	(2,102		)	(14,067		)	(16,521		)	—
	holders of unvested early exercised options and restricted stock	(45		)	(298		)	(206		)	—
	Undistributed net income (loss) attributable to common stockholders—basic	$	14,500		$	97,076		$	43,851		$	(79,947	)
	Add: adjustments to net income for dilutive securities allocable to:
	holders of preferred stock	2,229			1,940			2,281			—
	holders of unvested early exercised options and restricted stock	48			41			28			—
	Reallocation of undistributed earnings as a result of conversion of Class B to Class A	97,076			—			—			—
	Reallocation of undistributed earnings to Class B shares	—			2,237			—			—
	Undistributed net income (loss) attributable to common stockholders—diluted	$	113,853		$	101,294		$	46,160		$	(79,947	)
	Distributed earnings to common stockholders	$	—		$	—		$	—		84,828
	Denominator:
	Weighted-average common shares—basic	13,575			90,878			81,018			74,226
	Conversion of Class B to Class A common stock outstanding	90,878			—			—			—
	Effect of potentially dilutive securities:
	Stock options and RSUs	19,177			19,115			17,923			—
	Weighted-average common shares—diluted	123,630			109,993			98,941			74,226
	Net income per share attributable to common stockholders:
	Distributed earnings—basic	$	—		$	—		$	—		$	1.15
	Undistributed earnings—basic	$	1.07		$	1.07		$	0.54		$	(1.08	)
	Basic net income per share	$	1.07		$	1.07		$	0.54		$	0.07
	Distributed earnings—diluted	$	—		$	—		$	—		$	1.15
	Undistributed earnings—diluted	$	0.92		$	0.92		$	0.47		$	(1.08	)
	Diluted net income per share	$	0.92		$	0.92		$	0.47		$	0.07
Schedule of Antidilutive Securities Excluded from Computation of Net Income per Share
		Year ended December 31,
	(in thousands, except per share amounts)	2014						2013			2012
		Class A			Class B			Common			Common
	Numerator:
	Allocation of net income	$	16,647		$	111,441		$	60,578		$	32,262
	Less: common stock distributed earnings	—			—			—			(84,828		)
	Less: preferred stock distributed earnings, including accumulated accretion	—			—			—			(26,927		)
	Less: unvested early exercised options and restricted stock distributed earnings	—			—			—			(454		)
	Less: undistributed earnings allocable to:
	holders of preferred stock	(2,102		)	(14,067		)	(16,521		)	—
	holders of unvested early exercised options and restricted stock	(45		)	(298		)	(206		)	—
	Undistributed net income (loss) attributable to common stockholders—basic	$	14,500		$	97,076		$	43,851		$	(79,947	)
	Add: adjustments to net income for dilutive securities allocable to:
	holders of preferred stock	2,229			1,940			2,281			—
	holders of unvested early exercised options and restricted stock	48			41			28			—
	Reallocation of undistributed earnings as a result of conversion of Class B to Class A	97,076			—			—			—
	Reallocation of undistributed earnings to Class B shares	—			2,237			—			—
	Undistributed net income (loss) attributable to common stockholders—diluted	$	113,853		$	101,294		$	46,160		$	(79,947	)
	Distributed earnings to common stockholders	$	—		$	—		$	—		84,828
	Denominator:
	Weighted-average common shares—basic	13,575			90,878			81,018			74,226
	Conversion of Class B to Class A common stock outstanding	90,878			—			—			—
	Effect of potentially dilutive securities:
	Stock options and RSUs	19,177			19,115			17,923			—
	Weighted-average common shares—diluted	123,630			109,993			98,941			74,226
	Net income per share attributable to common stockholders:
	Distributed earnings—basic	$	—		$	—		$	—		$	1.15
	Undistributed earnings—basic	$	1.07		$	1.07		$	0.54		$	(1.08	)
	Basic net income per share	$	1.07		$	1.07		$	0.54		$	0.07
	Distributed earnings—diluted	$	—		$	—		$	—		$	1.15
	Undistributed earnings—diluted	$	0.92		$	0.92		$	0.47		$	(1.08	)
	Diluted net income per share	$	0.92		$	0.92		$	0.47		$	0.07
	The following potentially dilutive shares of common stock subject to options, unvested stock awards and redeemable convertible preferred stock were not included in the calculation of diluted shares outstanding as the effect would have been anti-dilutive:

Income_taxes_Tables

Income taxes (Tables)	12 Months Ended
	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Income Before Income Tax	Income before income tax consisted of the following:
		Years ended December 31,
	(in thousands)	2014				2013				2012
	Domestic	$	114,937			$	57,251			$	38,714
	Foreign	66,038				34,078				14,496
		$	180,975			$	91,329			$	53,210
Income Tax Expense	Income tax expense consisted of the following:
		Years ended December 31,
	(in thousands)	2014				2013				2012
	Current:
	Federal	$	55,846			$	28,856			$	19,984
	State	6,075				1,634				-493
	Foreign	8,219				8,058				3,578
	Total current	70,140				38,548				23,069
	Deferred:
	Federal	(13,551		)		-7,268				-2,247
	State	(3,369		)		-861				126
	Foreign	(333		)		332				—
	Total deferred	(17,253		)		-7,797				-2,121
	Income tax expense	$	52,887			$	30,751			$	20,948
Income Tax Expense Reconciles to Amount Computed by Applying Federal Statutory Rate	Income tax expense reconciles to the amount computed by applying the federal statutory rate (35%) to income before income taxes as follows:
		Years ended December 31,
		2014						2013					2012
	(in thousands, except percentage)	$			%			$			%		$			%
	Reconciliation to statutory rate:
	Tax at federal statutory rate	$	63,341		35	%		$	31,965		35	%	$	18,623		35	%
	State taxes, net of federal benefit	4,911			2.7			2,344			2.6		1,384			2.6
	Impact of foreign operations	(13,305		)	(7.4	)		(113		)	(0.1	)	(211		)	(0.4	)
	Stock-based compensation	8,050			4.4			2,982			3.3		1,385			2.6
	Tax credits	(10,616		)	(5.9	)		(5,637		)	(6.2	)	(415		)	(0.8	)
	Other	506			0.4			(790		)	(0.9	)	182			0.4
		$	52,887		29.2	%		$	30,751		33.7	%	$	20,948		39.4	%
Deferred Tax Assets and Liabilities	Significant components of the Company’s deferred tax assets and liabilities were as follows:
		December 31,
	(in thousands)	2014				2013
	Components of deferred tax assets and liabilities
	Deferred tax assets:
	Net operating loss carryforwards	$	—			$	252
	Tax credit carryforwards	2,347				—
	Stock-based compensation	9,950				3,475
	Accruals and reserves	23,950				15,463
	Total deferred tax assets	$	36,247			$	19,190
	Deferred tax liabilities:
	Depreciation and amortization	$	(3,418	)		$	(3,063	)
	Intangible assets	—				(550		)
	Total deferred tax liabilities	(3,418		)		(3,613		)
	Net deferred tax assets	$	32,829			$	15,577
Unrecognized Income Tax Benefits	A reconciliation of the beginning and ending amount of the unrecognized income tax benefits during the years ended December 31, 2014 and 2013 are as follows:
		December 31,
	(in thousands)	2014				2013				2012
	Gross balance at January 1	$	9,898			$	4,439			$	966
	Gross increase related to current year tax positions	6,401				5,280				3,473
	Gross increase related to prior year tax positions	259				179				—
		$	16,558			$	9,898			$	4,439

Commitments_contingencies_and_1

Commitments, contingencies and guarantees (Tables)	12 Months Ended
	Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract]
Schedule of the Company's Contractual Commitments	The following table summarizes the Company’s contractual commitments as of December 31, 2014:
	(in thousands)	Total		1 year		2-3 years		4-5 years		More than
				(fiscal		(fiscal		(fiscal		5 years
				2015)		2016 and 2017		2018 and		(beyond
								2019)		fiscal
										2019)
	Operating leases(1)	$	37,557	$	9,698	$	18,644	$	9,215	$	—
	Sponsorship commitments(2)	13,858		8,743		5,115		—		—
	Other contractual commitments(3)	7,395		2,899		4,496		—		—
	Capital equipment purchase commitments(4)	16,021		16,021		—		—		—
	Total contractual cash obligations	$	74,831	$	37,361	$	28,255	$	9,215	$	—
	-1	The Company leases its facilities under long-term operating leases, which expire at various dates through May 2019. The lease agreements frequently include leasehold improvement incentives, escalating lease payments, renewal provisions and other provisions which require the Company to pay taxes, insurance, maintenance costs or defined rent increases.
	-2	The Company sponsors sporting events, resorts and athletes as part of its marketing efforts. In many cases, the Company enters into multi-year agreements with event organizers, resorts and athletes.
	-3	In 2013, the Company purchased software licenses and engaged outside consultants to assist with upgrading or implementing its financial and IT systems, which require payments over multiple years.
	-4	The Company enters into contracts to acquire equipment for tooling and molds as part of its manufacturing operations. In addition, the Company incurs purchase commitments related to the manufacturing of its POP displays by third parties.
Schedule of Product Warranty Liability Activity	The following table summarizes the warranty liability activity:
		Years ended December 31,
	(in thousands)	2014		2013		2012
	Beginning balances	$	3,870	$	1,937	$	589
	Charged to cost of revenue	10,268		7,380		2,821
	Settlements of warranty claims	-7,733		-5,447		-1,473
	Ending balances	$	6,405	$	3,870	$	1,937

Concentrations_of_risk_and_seg1

Concentrations of risk and segment information (Tables)	12 Months Ended
	Dec. 31, 2014
Risks and Uncertainties [Abstract]
Schedules of Customer Concentration by Risk Factor	The Company had one customer with revenue equal to or greater than 10% of total revenue for the years ended December 31, 2014, 2013, and 2012, as shown in the table below:
		Years ended December 31,
		2014		2013			2012
	A (retailer)	20	%	17	%		15	%
	*	Less than 10% of total revenue for the period indicated
	As of December 31, 2014 and 2013, the Company had the following customers who represented 10% or more of its net accounts receivable balance:
		Years ended December 31,
		2014		2013
	A (distributor)	17	%	14	%
	B (retailer)	14	%	*
	C (retailer)	11	%	11	%
	D (retailer)	*		21	%
Schedule of Revenue by Geographic Region	Revenue by geographic region, based on ship-to destinations, was as follows:
		Year ended December 31,
	(in thousands)	2014			2013				2012
	Americas	$	890,352		$	557,285			$	314,135
	Europe, Middle East and Africa (EMEA)	371,197			322,226				161,193
	Asia and Pacific area countries (APAC)	132,656			106,226				50,688
		$	1,394,205		$	985,737			$	526,016

Acquisitions_Tables

Acquisitions (Tables)	12 Months Ended
	Dec. 31, 2014
Business Combinations [Abstract]
Purchase Price Allocation and Useful Life of Acquried Assets	The purchase price of the transaction was allocated as follows:
	(in thousands)	Estimated	Purchase
		useful life	price
		(in years)
	Purchased intangible asset:
	Noncompete agreements	2	$	161
	Goodwill (non-tax deductible)		9,862
	Other assets and liabilities acquired, net of cash		84
	Total assets acquired		$	10,107

Business_Overview_Additional_I

Business Overview - Additional Information (Detail) (USD $)	1 Months Ended	12 Months Ended			0 Months Ended	1 Months Ended
	Jul. 31, 2012	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Jul. 01, 2014	Nov. 30, 2014
Class of Stock [Line Items]
Stock split ratio	3
Initial public offering price (in dollars per share)				$17.08
Aggregate gross proceeds from sale of stock		$293,969,000	$0	$0
Common Class A [Member] | IPO [Member]
Class of Stock [Line Items]
Shares of stock sold as part of public offering					8,900,000
Shares of stock sold by certain stockholders as part of underwritten public offering					11,570,000
Shares of stock sold by certain stockholders as part of underwriterss options to purchase additional shares through underwritten public offering					2,670,000
Initial public offering price (in dollars per share)					$24
Aggregate gross proceeds from sale of stock					200,800,000	93,200,000
Underwriting discounts and commissions of initial public offering					12,800,000
Initial offering costs incurred					6,200,000
Common Class A [Member] | Follow-on Offering [Member]
Class of Stock [Line Items]
Shares of stock sold as part of public offering						1,287,533
Shares of stock sold by certain stockholders as part of underwritten public offering						10,627,042
Shares of stock sold by certain stockholders as part of underwriterss options to purchase additional shares through underwritten public offering						1,554,075
Initial public offering price (in dollars per share)						$75
Underwriting discounts and commissions of initial public offering						3,400,000
Initial offering costs incurred						$1,500,000

Recovered_Sheet1

Summary of Significant Accounting Policies (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
	Unit
Accounting Policies [Abstract]
Inventory, estimated future demand period	12 months
Number of reporting units	1
Goodwill impairments	$0	$0	$0
Impairment of long-lived assets	0	0	0
Deferred implied PCS revenue	11,600,000	6,400,000
Advertising costs	$47,200,000	$55,500,000	$46,900,000
Property, Plant and Equipment [Line Items]
Warranty period	12 months
European Union [Member]
Property, Plant and Equipment [Line Items]
Warranty period	2 years
Minimum [Member]
Property, Plant and Equipment [Line Items]
POP displays, capitalization period	24 months
Property, plant and equipment useful life	1 year
Maximum [Member]
Property, Plant and Equipment [Line Items]
POP displays, capitalization period	36 months
Property, plant and equipment useful life	7 years

Fair_value_measurements_Detail

Fair value measurements (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	$102,327	$0
U.S. Treasury Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	1,994	0
U.S. Agency Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	7,020	0
Commercial Paper [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	2,497	0
Corporate Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	90,816	0
Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents	82,968
Marketable securities	102,327
Recurring [Member] | U.S. Treasury Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	1,994
Recurring [Member] | U.S. Agency Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	7,020
Recurring [Member] | Commercial Paper [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	2,497
Recurring [Member] | Corporate Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	90,816
Recurring [Member] | Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents	80,968
Recurring [Member] | Corporate Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents	2,000
Recurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents	80,968
Marketable securities	1,994
Recurring [Member] | Level 1 [Member] | U.S. Treasury Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	1,994
Recurring [Member] | Level 1 [Member] | U.S. Agency Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	0
Recurring [Member] | Level 1 [Member] | Commercial Paper [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	0
Recurring [Member] | Level 1 [Member] | Corporate Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	0
Recurring [Member] | Level 1 [Member] | Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents	80,968
Recurring [Member] | Level 1 [Member] | Corporate Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents	0
Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents	2,000
Marketable securities	100,333
Recurring [Member] | Level 2 [Member] | U.S. Treasury Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	0
Recurring [Member] | Level 2 [Member] | U.S. Agency Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	7,020
Recurring [Member] | Level 2 [Member] | Commercial Paper [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	2,497
Recurring [Member] | Level 2 [Member] | Corporate Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	90,816
Recurring [Member] | Level 2 [Member] | Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents	0
Recurring [Member] | Level 2 [Member] | Corporate Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents	2,000
Recurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents	0
Marketable securities	0
Recurring [Member] | Level 3 [Member] | U.S. Treasury Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	0
Recurring [Member] | Level 3 [Member] | U.S. Agency Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	0
Recurring [Member] | Level 3 [Member] | Commercial Paper [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	0
Recurring [Member] | Level 3 [Member] | Corporate Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	0
Recurring [Member] | Level 3 [Member] | Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents	0
Recurring [Member] | Level 3 [Member] | Corporate Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents	$0

Balance_sheet_components_Cash_

Balance sheet components - Cash, Cash Equivalents and Marketable Securities (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
In Thousands, unless otherwise specified
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	$319,929	$101,410	$36,485	$29,098
Marketable securities	102,327	0
Commercial Paper [Member]
Cash and Cash Equivalents [Line Items]
Marketable securities	2,497	0
U.S. Treasury Securities [Member]
Cash and Cash Equivalents [Line Items]
Marketable securities	1,994	0
U.S. Agency Securities [Member]
Cash and Cash Equivalents [Line Items]
Marketable securities	7,020	0
Corporate Debt Securities [Member]
Cash and Cash Equivalents [Line Items]
Marketable securities	90,816	0
Cash [Member]
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	236,961	101,410
Money Market Funds [Member]
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	80,968
Corporate Debt Securities [Member]
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	$2,000	$0

Balance_sheet_components_Unrea

Balance sheet components - Unrealized Gains (Losses) on Available-for-sale Securities (Details) (USD $)	Dec. 31, 2014
In Millions, unless otherwise specified
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Marketable securities with contractual maturity of one year or less	$58.80
Marketable securities with contractual maturity of one to two years	$43.50

Balance_sheet_components_Inven

Balance sheet components - Inventory (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Components	$4,324	$8,000
Finished goods	148,702	103,994
Inventories, net	$153,026	$111,994

Balance_sheet_components_Prepa

Balance sheet components - Prepaid Expenses and Other Current Assets (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Prepaid Expense and Other Assets [Abstract]
Prepaid income taxes	$26,504	$0
Current deferred tax assets	24,218	15,173
Prepaid expenses	3,905	2,739
Prepaid licenses	2,053	1,091
Deposits	1,244	2,049
Other current assets	5,845	915
Prepaid expenses and other current assets	$63,769	$21,967

Balance_sheet_components_Prope

Balance sheet components - Property and Equipment (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Property, Plant and Equipment [Line Items]
Gross property and equipment	$71,356,000	$46,518,000
Less: Accumulated depreciation and amortization	-29,800,000	-14,407,000
Property and equipment, net	41,556,000	32,111,000
Depreciation expense	16,800,000	10,900,000	2,800,000
Minimum [Member]
Property, Plant and Equipment [Line Items]
Useful life	1 year
Maximum [Member]
Property, Plant and Equipment [Line Items]
Useful life	7 years
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Gross property and equipment	22,787,000	20,111,000
Leasehold Improvements [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Useful life	3 years
Leasehold Improvements [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Useful life	7 years
Computers, Software, Equipment and Furniture [Member]
Property, Plant and Equipment [Line Items]
Gross property and equipment	24,636,000	11,988,000
Computers, Software, Equipment and Furniture [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Useful life	2 years
Computers, Software, Equipment and Furniture [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Useful life	4 years
Tooling [Member]
Property, Plant and Equipment [Line Items]
Gross property and equipment	16,159,000	8,799,000
Tooling [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Useful life	1 year
Tooling [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Useful life	4 years
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Gross property and equipment	3,944,000	2,151,000
Tradeshow Equipment [Member]
Property, Plant and Equipment [Line Items]
Gross property and equipment	2,863,000	2,613,000
Tradeshow Equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Useful life	2 years
Tradeshow Equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Useful life	5 years
Automobiles [Member]
Property, Plant and Equipment [Line Items]
Gross property and equipment	$967,000	$856,000
Automobiles [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Useful life	3 years
Automobiles [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Useful life	5 years

Balance_sheet_components_Goodw

Balance sheet components - Goodwill and Acquired Intangible Assets (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Goodwill [Roll Forward]
Goodwill at beginning of period	$14,095,000	$4,233,000
Acquisition		9,862,000
Adjustments (unaudited)	0
Goodwill at end of period	14,095,000	14,095,000	4,233,000
Goodwill impairments	$0	$0	$0

Balance_sheet_components_Intan

Balance sheet components - Intangible Assets (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Finite-Lived Intangible Assets [Line Items]
Gross	$7,290,000	$6,490,000
Accumulated amortization	-4,353,000	-3,220,000
Intangible assets, net	2,922,000
Net	2,937,000	3,270,000
Amortization expense	1,100,000	1,100,000	1,200,000
Developed Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Gross	6,130,000	5,330,000
Accumulated amortization	-3,427,000	-2,517,000
Intangible assets, net	2,703,000	2,813,000
Weighted average remaining useful life	2 years 4 months 24 days	3 years 2 months 12 days
Tradename [Member]
Finite-Lived Intangible Assets [Line Items]
Gross	664,000	664,000
Accumulated amortization	-509,000	-376,000
Intangible assets, net	155,000	288,000
Weighted average remaining useful life	1 year 2 months 12 days	2 years 2 months 12 days
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross	170,000	170,000
Accumulated amortization	-170,000	-161,000
Intangible assets, net	0	9,000
Weighted average remaining useful life	0 years	2 months 12 days
Noncompete Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Gross	311,000	311,000
Accumulated amortization	-247,000	-166,000
Intangible assets, net	64,000	145,000
Weighted average remaining useful life	9 months 18 days	1 year 9 months 18 days
Domain name [Member]
Finite-Lived Intangible Assets [Line Items]
Gross	15,000	15,000
Accumulated amortization	0	0
Intangible assets, net	$15,000	$15,000

Balance_sheet_components_Futur

Balance sheet components - Future Amortization Expense (Detail) (USD $)	Dec. 31, 2014
In Thousands, unless otherwise specified
Finite-Lived Intangible Assets [Line Items]
2015	$1,352
2016	1,177
2017	393
Intangible assets, net	2,922
Cost of Revenue [Member]
Finite-Lived Intangible Assets [Line Items]
2015	888
2016	888
2017	149
Intangible assets, net	1,925
Operating Expenses [Member]
Finite-Lived Intangible Assets [Line Items]
2015	464
2016	289
2017	244
Intangible assets, net	$997

Balance_sheet_components_Other

Balance sheet components - Other Long-Term Assets (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Organization, Consolidation and Presentation of Financial Statements [Abstract]
POP displays	$18,743,000	$22,379,000
Long-term deferred tax assets	8,611,000	736,000
Deposits	4,706,000	2,698,000
Long-term licenses and other	4,000,000	4,000,000
Deferred financing charges	0	947,000
Deferred public offering costs	0	1,395,000
Other long-term assets	36,060,000	32,155,000
POP display amortization	$18,000,000	$13,500,000	$8,600,000

Balance_sheet_components_Accru

Balance sheet components - Accrued Liabilities (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Accrued payables	$57,064	$49,975
Employee related liabilities	28,959	11,932
Accrued sales incentives	9,635	4,909
Warranty liability	6,025	3,691
Customer deposits	4,903	1,316
Sales commissions	4,254	2,454
Other	4,935	12,114
Accrued liabilities	$115,775	$86,391

Redeemable_convertible_preferr1

Redeemable convertible preferred stock (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Temporary Equity [Line Items]
Preferred stock authorized (in shares)	0	36,000,000
Preferred stock issued (in shares)	0	30,523,036
Preferred stock outstanding (in shares)	0	30,523,036
Series A Preferred Stock [Member]
Temporary Equity [Line Items]
Preferred stock authorized (in shares)		36,000,000
Preferred stock issued (in shares)		30,523,036
Preferred stock outstanding (in shares)		30,523,036
Convertible preferred stock redemption price (in US$ per share)	$2.53
Convertible preferred stock - redemption period after July 1st, 2017	365 days
Common Class B [Member]
Temporary Equity [Line Items]
Common stock conversion basis	1-for-1
Convertible preferred stock, shares issued upon conversion	1

Stockholders_equity_deficit_Na

Stockholders' equity (deficit) - Narrative (Detail) (USD $)	1 Months Ended		12 Months Ended			1 Months Ended
	Jun. 30, 2014	Dec. 31, 2012	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Nov. 30, 2014	Oct. 30, 2013	Aug. 31, 2010	Oct. 18, 2013
		employee				consultant	founder	founder
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Preferred stock shares, authorized			5,000,000	0
Preferred stock shares, issued			0
Preferred stock shares, outstanding			0
Common stock, shares authorized				150,000,000
Common stock, shares issued				81,420,040
Common stock, shares outstanding				81,420,040
Conversion ratio when Class B common stock represents less than 10% of aggregate number of shares of common stock outstanding	1
Shares reserved for future issuance		1,973,000	42,326,000		1,973,000	400,000
Total fair value of stock options vested during period			$16,000,000	$5,200,000	$3,000,000
Unearned stock based compensation to be expensed			62,600,000
Number of shares that can be purchased with options granted in period			5,208,000	2,906,000	1,418,000
Dividend yield			0.00%
Allocated share-based compensation expense			71,399,000	10,887,000	9,156,000
Options outstanding (in shares)		24,402,000	25,134,000	26,724,000	24,402,000	26,361,000
Stock option modification charge					1,100,000
Number of employees who sold their shares		8
Common stock sold by employees (in shares)		760,500
Common stock sold by employees		13,000,000			13,000,000
Price of share sold by employees (in dollars per share)		$17.08			$17.08
Stock-based compensation expense recognized		2,600,000
Shares repurchased from employees		240,000
Number of employees who are family members of the Company's CEO		2
Stock Options Modified [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding (in shares)		250,000			250,000
Number of employees affected with plan modification					3
General and Administrative Expense [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated share-based compensation expense			48,496,000	1,524,000	1,036,000
Stock-based compensation expense recognized		600,000
Research and Development [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated share-based compensation expense			11,640,000	3,003,000	1,452,000
Stock-based compensation expense recognized		300,000
Sales and Marketing Expense [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated share-based compensation expense			10,428,000	5,670,000	6,335,000
Stock option modification charge					1,000,000
Stock-based compensation expense recognized		1,700,000
Consultants [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period						2 years
Number of shares that can be purchased with options granted in period						210,000
Exercise price of stock options (in dollars per share)						$1.52
Number of consultants						2
General Things [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unearned stock-based compensation currently estimated to be expensed										6,900,000
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unearned stock-based compensation expected recognition period			2 years 8 months 12 days
Allocated share-based compensation expense			17,450,000	8,468,000	8,165,000
RSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unearned stock-based compensation expected recognition period			2 years 10 months 24 days
Total fair value of awards vested during period			28,200,000
RSUs awarded (in shares)			5,573,000	0	0
Unearned stock based compensation estimated to be expensed			94,700,000
Restricted stock units outstanding (in shares)		270,000	4,307,000	270,000	270,000
Number of shares vested upon grant			1,533,000
Dividend yield			50.90%
Allocated share-based compensation expense			41,412,000	0	0
RSUs [Member] | CEO [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock units outstanding (in shares)	4,500,000		3,000,000
Number of shares vested upon grant	1,500,000
RSUs [Member] | CEO [Member] | General and Administrative Expense [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated share-based compensation expense			38,300,000
ESPP [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Purchase price of common stock as percentage of fair value of Company common stock (percent)	85.00%
Common stock offering period	6 months
Common stock purchase price discount as percentage of eligible compensation (percent)	15.00%
Maximum number of shares allowed to be purchased by employees per offering period	2,500
Shares reserved for future issuance			3,367,557
Dividend yield			45.50%
Allocated share-based compensation expense			1,704,000	0	0
Restricted Stock and Early-exercised Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unearned stock-based compensation expected recognition period			1 month 6 days
Total fair value of awards vested during period			11,200,000	6,100,000	2,900,000
Unearned stock-based compensation currently estimated to be expensed			100,000
RSUs awarded (in shares)				430,000
Restricted stock units outstanding (in shares)		432,000	17,000	487,000	432,000	644,000
Number of shares vested upon grant			470,000	375,000	212,000
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated share-based compensation expense			10,833,000	2,419,000	991,000
Number of shares with accelerated vesting			195,740
Number of founders terminated							1
Restricted Stock [Member] | Research and Development [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Accelerated compensation cost			$3,200,000
Restricted Stock [Member] | Consultants [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period						3 years
Restricted stock units issued (in shares)						433,500
Restricted Stock [Member] | General Things [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period								3 years
Shares issued pursuant to acquisition								430,000
Number of founders of the acquired company to whom shares were issued								2
Restricted Stock [Member] | Shares Subject to Monthly Vesting Over a Three-year Service Period [Member] | General Things [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued pursuant to acquisition								322,500
2014 Equity Incentive Plans [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of common shares authorized for grant			13,973,723
Shares of common stock previously reserved but unissued under the 2010 EIP			339,259
Number of shares previously issuable under the 2010 EIP			164,235
2014 Equity Incentive Plans [Member] | Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration period	10 years
Award vesting period	4 years
Exercisable rate subsequent to first anniversary (percent)	25.00%
Award vesting period, monthly vesting	36 months
2014 Equity Incentive Plans [Member] | RSUs [Member] | Share-based Compensation Award, Tranche One [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	3 years
2014 Equity Incentive Plans [Member] | RSUs [Member] | Share-based Compensation Award, Tranche Two [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	4 years
2010 Equity Incentive Plans [Member] | Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration period									10 years
2010 Equity Incentive Plans [Member] | Stock Options and RSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period									4 years
Common Class A [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, shares authorized			500,000,000	0
Common stock, shares issued			52,091,317
Common stock, shares outstanding			52,091,317
Common stock, voting rights, number	1
Common Class B [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, shares authorized			150,000,000	150,000,000
Common stock, shares issued			77,023,371	81,420,040
Common stock, shares outstanding			77,023,371	81,420,040
Common stock, voting rights, number	10

Stockholders_equity_deficit_Co

Stockholders' equity (deficit) - Common Stock Reserved for Issuance (Detail)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options outstanding (in shares)	25,134,000	26,724,000	24,402,000	26,361,000
Stock options, restricted stock and RSUs available for future grants (in shares)	42,326,000		1,973,000	400,000
RSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock units outstanding (in shares)	4,307,000	270,000	270,000
Stock Options, Restricted Stock, and Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options, restricted stock and RSUs available for future grants (in shares)	12,885,000	1,306,000

Stockholders_equity_deficit_St

Stockholders' equity (deficit) - Stock Option Activity (Detail) (USD $)	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Shares Available For Grant
Shares available for grant, beginning balance		1,973,000	400,000
Additional shares authorized	21,970,000	2,000,000	2,100,000
Granted (in shares)	-5,208,000	-2,906,000	-1,418,000
Forfeited/Cancelled (in shares)	390,000	239,000	891,000
Shares available for grant, ending balance	42,326,000		1,973,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Options outstanding, beginning balance (in shares)	26,724,000	24,402,000	26,361,000
Granted (in shares)	5,208,000	2,906,000	1,418,000
Exercised (in shares)	-6,419,000	-345,000	-2,486,000
Forfeited/Cancelled (in shares)	-379,000	-239,000	-891,000
Options outstanding, ending balance (in shares)	25,134,000	26,724,000	24,402,000
Options exercisable (in shares)	17,971,000
Options vested and expected to vest (in shares)	24,743,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Options outstanding - Weighted average exercise price, beginning balance (in dollars per share)	$2.47	$1	$0.80
Options granted - weighted average exercise price (in dollars per share)	$21.68	$15.14	$5.10
Options exercised - Weighted average exercise price (in dollars per share)	$1.24	$2.23	$1.11
Options forfeited/cancelled - Weighted average exercise price (in dollars per share)	$12.11	$6.31	$1.43
Options outstanding - Weighted average exercise price, ending balance (in dollars per share)	$6.62	$2.47	$1
Exercisable - Weighted average exercise price (in dollars per share)	$2
Vested and expected to vest - Weighted average exercise price (in dollars per share)	$6.43
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Weighted average fair value at grant date (in dollars per share)	$11.51	$8.45	$5.02
Options exercised - Total intrinsic value of options exercised	$253,332	$4,564	$30,605
Options outstanding - Weighted-average remaining contractual term	7 years 1 month 2 days	7 years 6 months 18 days	8 years 3 months 29 days
Options exercisable - Weighted average remaining contractual term	6 years 4 months 13 days
Options vested and expected to vest - Weighted average remaining contractual term	7 years 0 months 22 days
Options outstanding - Aggregate intrinsic value	1,425,339	367,395	310,454
Options exercisable - Aggregate intrinsic value	1,100,208
Options vested and expected to vest - Aggregate intrinsic value	$1,407,823
Stock Options, Restricted Stock, and Restricted Stock Units (RSUs) [Member]
Shares Available For Grant
Shares available for grant, ending balance	12,885,000	1,306,000
RSUs [Member]
Shares Available For Grant
RSUs granted (in shares)	-5,573,000	0	0

Stockholders_equity_deficit_Op

Stockholders' equity (deficit) - Options Outstanding and Exercisable (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options outstanding (in shares)	25,134,000	26,724,000	24,402,000	26,361,000
Options outstanding, Weighted- average remaining contractual life (in years)	7 years 1 month 2 days	7 years 6 months 18 days	8 years 3 months 29 days
Options outstanding, Weighted- average exercise price (in dollars per share)	$6.62	$2.47	$1	$0.80
Options exercisable (in shares)	17,971,000
Options exercisable, Weighted- average exercise price (in dollars per share)	$2
0.18-0.66 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of exercise prices - Lower limit (in dollars per share)	$0.18
Range of exercise prices - Upper limit (in dollars per share	$0.66
Options outstanding (in shares)	7,696,000
Options outstanding, Weighted- average remaining contractual life (in years)	5 years 9 months
Options outstanding, Weighted- average exercise price (in dollars per share)	$0.62
Options exercisable (in shares)	7,696,000
Options exercisable, Weighted- average exercise price (in dollars per share)	$0.62
0.76-0.76 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of exercise prices - Lower limit (in dollars per share)	$0.76
Range of exercise prices - Upper limit (in dollars per share	$0.76
Options outstanding (in shares)	7,769,000
Options outstanding, Weighted- average remaining contractual life (in years)	6 years 5 months 16 days
Options outstanding, Weighted- average exercise price (in dollars per share)	$0.76
Options exercisable (in shares)	7,572,000
Options exercisable, Weighted- average exercise price (in dollars per share)	$0.76
1.52-2.96 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of exercise prices - Lower limit (in dollars per share)	$1.52
Range of exercise prices - Upper limit (in dollars per share	$2.96
Options outstanding (in shares)	1,606,000
Options outstanding, Weighted- average remaining contractual life (in years)	7 years 0 months 4 days
Options outstanding, Weighted- average exercise price (in dollars per share)	$1.91
Options exercisable (in shares)	1,119,000
Options exercisable, Weighted- average exercise price (in dollars per share)	$1.86
8.30-8.30 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of exercise prices - Lower limit (in dollars per share)	$8.30
Range of exercise prices - Upper limit (in dollars per share	$8.30
Options outstanding (in shares)	462,000
Options outstanding, Weighted- average remaining contractual life (in years)	7 years 8 months 12 days
Options outstanding, Weighted- average exercise price (in dollars per share)	$8.30
Options exercisable (in shares)	244,000
Options exercisable, Weighted- average exercise price (in dollars per share)	$8.30
13.72-15.59 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of exercise prices - Lower limit (in dollars per share)	$13.72
Range of exercise prices - Upper limit (in dollars per share	$15.59
Options outstanding (in shares)	1,771,000
Options outstanding, Weighted- average remaining contractual life (in years)	8 years 4 months 10 days
Options outstanding, Weighted- average exercise price (in dollars per share)	$14.68
Options exercisable (in shares)	687,000
Options exercisable, Weighted- average exercise price (in dollars per share)	$14.61
16.19-16.39 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of exercise prices - Lower limit (in dollars per share)	$16.19
Range of exercise prices - Upper limit (in dollars per share	$16.39
Options outstanding (in shares)	2,466,000
Options outstanding, Weighted- average remaining contractual life (in years)	9 years 0 months 22 days
Options outstanding, Weighted- average exercise price (in dollars per share)	$16.26
Options exercisable (in shares)	368,000
Options exercisable, Weighted- average exercise price (in dollars per share)	$16.21
18.40-18.40 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of exercise prices - Lower limit (in dollars per share)	$18.40
Range of exercise prices - Upper limit (in dollars per share	$18.40
Options outstanding (in shares)	2,793,000
Options outstanding, Weighted- average remaining contractual life (in years)	9 years 5 months 1 day
Options outstanding, Weighted- average exercise price (in dollars per share)	$18.40
Options exercisable (in shares)	285,000
Options exercisable, Weighted- average exercise price (in dollars per share)	$18.40
38.84-81.50 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of exercise prices - Lower limit (in dollars per share)	$38.84
Range of exercise prices - Upper limit (in dollars per share	$81.50
Options outstanding (in shares)	571,000
Options outstanding, Weighted- average remaining contractual life (in years)	9 years 7 months 24 days
Options outstanding, Weighted- average exercise price (in dollars per share)	$54.90
Options exercisable (in shares)	0
Options exercisable, Weighted- average exercise price (in dollars per share)	$0
0.18-81.50 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of exercise prices - Lower limit (in dollars per share)	$0.18
Range of exercise prices - Upper limit (in dollars per share	$81.50
Options outstanding (in shares)	25,134,000
Options outstanding, Weighted- average remaining contractual life (in years)	7 years 1 month 2 days
Options outstanding, Weighted- average exercise price (in dollars per share)	$6.62
Options exercisable (in shares)	17,971,000
Options exercisable, Weighted- average exercise price (in dollars per share)	$2

Stockholders_equity_deficit_Re

Stockholders' equity (deficit) - Restricted Stock, Restricted Stock Units and Early-exercised Options Activity (Detail) (USD $)	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Restricted Stock and Early-exercised Options [Member]
Shares
Non-vested shares, beginning balance	487,000	432,000	644,000
Granted (in shares)		430,000
Vested (in shares)	-470,000	-375,000	-212,000
Non-vested shares, ending balance	17,000	487,000	432,000
Weighted- average grant date fair value
Non-vested shares, beginning balance (in dollars per share)	$11.03	$2.44	$2.44
Granted (in dollars per share)		$16.19
Non-vested shares, ending balance (in dollars per share)	$6.30	$11.03	$2.44
Non-vested shares - Aggregate intrinsic value	$1,017	$7,628	$5,274	$711
Granted - Aggregate intrinsic value		$6,962
RSUs [Member]
Shares
Non-vested shares, beginning balance	270,000	270,000
Granted (in shares)	5,573,000	0	0
Vested (in shares)	-1,533,000
Forfeited (in shares)	-3,000
Non-vested shares, ending balance	4,307,000	270,000	270,000
Weighted- average grant date fair value
Non-vested shares, beginning balance (in dollars per share)	$1.52	$1.52
Granted (in dollars per share)	$22.01
Vested (in dollars per share)	$18.42
Forfeited (in dollars per share)	$57.73
Non-vested shares, ending balance (in dollars per share)	$21.98	$1.52	$1.52

Stockholders_equity_deficit_Fa

Stockholders' equity (deficit) - Fair Value Assumptions for Stock Options (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Volatility	0.00%
Weighted average fair value (in dollars per share)	$11.51	$8.45	$5.02
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate - lower range	1.70%	0.80%	0.80%
Risk-free interest rate - upper range	2.00%	2.40%	2.40%
Dividend yield	0.00%	0.00%	0.00%
Expected forfeiture rate		6.00%
Weighted average fair value (in dollars per share)	$11.51	$8.45	$5.08
Stock Options [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Volatility	54.00%	56.00%	56.00%
Expected term (years)	5 years 3 months 18 days	5 years 3 months 18 days	5 years 1 month 6 days
Expected forfeiture rate	4.00%		5.00%
Stock Options [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Volatility	56.00%	60.00%	60.00%
Expected term (years)	6 years 3 months 18 days	6 years 1 month 6 days	6 years 1 month 6 days
Expected forfeiture rate	6.00%		7.00%

Stockholders_equity_deficit_Fa1

Stockholders' equity (deficit) - Fair Value Assumptions for Restricted Stock Units and ESPP (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected volatility	0.00%
RSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected volatility	50.90%
Expected term (years)	10 years
Risk-free interest rate	2.69%
Dividend yield	0.00%
Grant date fair value of underlying shares	18.4
RSUs [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected forfeiture rate	4.00%
RSUs [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected forfeiture rate	6.00%
ESPP [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected volatility	45.50%
Expected term (years)	7 months 6 days
Risk-free interest rate	0.10%
Dividend yield	0.00%

Stockholders_equity_deficit_Ex

Stockholders' equity (deficit) - Expense Related to Stock Options, Restricted Stock and RSU (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation expense	$71,399	$10,887	$9,156
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation expense	17,450	8,468	8,165
RSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation expense	41,412	0	0
RSAs [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation expense	10,833	2,419	991
ESPP [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation expense	$1,704	$0	$0

Stockholders_equity_deficit_Ex1

Stockholders' equity (deficit) - Expense Reported in Consolidated Statements of Operations (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation expense	$71,399	$10,887	$9,156
Total tax benefit recognized	-19,471	-1,104	-1,091
Decrease in net income	51,928	9,783	8,065
Cost of Revenue [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation expense	835	690	333
Research and Development [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation expense	11,640	3,003	1,452
Sales and Marketing [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation expense	10,428	5,670	6,335
General and Administrative [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation expense	$48,496	$1,524	$1,036

Net_Income_Loss_per_Share_Attr

Net Income (Loss) per Share Attributable to Common Stockholders - Basic and Diluted Net Income per Share Attributable to Common Stockholders (Detail) (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Numerator [Abstract]
Allocation of net income	$128,088	$60,578	$32,262
Distributed earnings to common stockholders	0	0	-84,828
Less: unvested early exercised options and restricted stock distributed earnings	0	0	-112,209
Less: undistributed earnings allocable to participating securities	-16,512	-16,727	0
Undistributed net income (loss) attributable to common stockholders—basic	111,576	43,851	-79,947
Add: adjustments to net income for dilutive securities allocable to: holders of preferred stock and unvested early exercised options and restricted stock	-2,277	-2,309	0
Undistributed net income (loss) attributable to common stockholders-diluted	113,853	46,160	-79,947
Distributed earnings to common stockholders	0	0	84,828
Exercise of stock options, Shares	6,419	345	2,486
Denominator:
Weighted-average common shares—basic	104,453	81,018	74,226
Weighted-average common shares—diluted	123,630	98,941	74,226
Net income per share attributable to common stockholders:
Basic net income per share (in dollars per share)	$1.07	$0.54	$0.07
Diluted net income per share (in dollars per share)	$0.92	$0.47	$0.07
Common Class A [Member]
Numerator [Abstract]
Allocation of net income	16,647
Distributed earnings to common stockholders	0
Less: preferred stock distributed earnings, including accumulated accretion	0
Less: unvested early exercised options and restricted stock distributed earnings	0
Undistributed net income (loss) attributable to common stockholders—basic	14,500
Reallocation of undistributed earnings as a result of conversion of Class B to Class A	97,076
Reallocation of undistributed earnings to Class B shares	0
Undistributed net income (loss) attributable to common stockholders-diluted	113,853
Distributed earnings to common stockholders	0
Denominator:
Weighted-average common shares—basic	13,575
Conversion of Class B to Class A common stock outstanding	90,878
Stock options and RSUs	19,177
Weighted-average common shares—diluted	123,630
Net income per share attributable to common stockholders:
Distributed earnings—basic (in dollars per share)	$0
Undistributed earnings—basic (in dollars per share)	$1.07
Basic net income per share (in dollars per share)	$1.07
Distributed earnings-diluted (in dollars per share)	$0
Undistributed earnings-diluted (in dollars per share)	$0.92
Diluted net income per share (in dollars per share)	$0.92
Common Class A [Member] | Preferred Stock [Member]
Numerator [Abstract]
Less: undistributed earnings allocable to participating securities	-2,102
Add: adjustments to net income for dilutive securities allocable to: holders of preferred stock and unvested early exercised options and restricted stock	2,229
Common Class A [Member] | Restricted Stock and Early-exercised Options [Member]
Numerator [Abstract]
Less: undistributed earnings allocable to participating securities	-45
Add: adjustments to net income for dilutive securities allocable to: holders of preferred stock and unvested early exercised options and restricted stock	48
Common Class B [Member]
Numerator [Abstract]
Allocation of net income	111,441
Distributed earnings to common stockholders	0
Less: preferred stock distributed earnings, including accumulated accretion	0
Less: unvested early exercised options and restricted stock distributed earnings	0
Undistributed net income (loss) attributable to common stockholders—basic	97,076
Reallocation of undistributed earnings as a result of conversion of Class B to Class A	0
Reallocation of undistributed earnings to Class B shares	2,237
Undistributed net income (loss) attributable to common stockholders-diluted	101,294
Distributed earnings to common stockholders	0
Denominator:
Weighted-average common shares—basic	90,878
Conversion of Class B to Class A common stock outstanding	0
Stock options and RSUs	19,115
Weighted-average common shares—diluted	109,993
Net income per share attributable to common stockholders:
Distributed earnings—basic (in dollars per share)	$0
Undistributed earnings—basic (in dollars per share)	$1.07
Basic net income per share (in dollars per share)	$1.07
Distributed earnings-diluted (in dollars per share)	$0
Undistributed earnings-diluted (in dollars per share)	$0.92
Diluted net income per share (in dollars per share)	$0.92
Common Class B [Member] | Preferred Stock [Member]
Numerator [Abstract]
Less: undistributed earnings allocable to participating securities	-14,067
Add: adjustments to net income for dilutive securities allocable to: holders of preferred stock and unvested early exercised options and restricted stock	1,940
Common Class B [Member] | Restricted Stock and Early-exercised Options [Member]
Numerator [Abstract]
Less: undistributed earnings allocable to participating securities	-298
Add: adjustments to net income for dilutive securities allocable to: holders of preferred stock and unvested early exercised options and restricted stock	41
Common Stock [Member]
Numerator [Abstract]
Allocation of net income		60,578	32,262
Distributed earnings to common stockholders		0	-84,828
Less: preferred stock distributed earnings, including accumulated accretion		0	-26,927
Less: unvested early exercised options and restricted stock distributed earnings		0	-454
Undistributed net income (loss) attributable to common stockholders—basic		43,851	-79,947
Reallocation of undistributed earnings as a result of conversion of Class B to Class A		0	0
Reallocation of undistributed earnings to Class B shares		0	0
Undistributed net income (loss) attributable to common stockholders-diluted		46,160	-79,947
Distributed earnings to common stockholders		0	84,828
Denominator:
Weighted-average common shares—basic		81,018	74,226
Conversion of Class B to Class A common stock outstanding		0	0
Stock options and RSUs		17,923	0
Weighted-average common shares—diluted		98,941	74,226
Net income per share attributable to common stockholders:
Distributed earnings—basic (in dollars per share)		$0	$1.15
Undistributed earnings—basic (in dollars per share)		$0.54	($1.08)
Basic net income per share (in dollars per share)		$0.54	$0.07
Distributed earnings-diluted (in dollars per share)		$0	$1.15
Undistributed earnings-diluted (in dollars per share)		$0.47	($1.08)
Diluted net income per share (in dollars per share)		$0.47	$0.07
Common Stock [Member] | Preferred Stock [Member]
Numerator [Abstract]
Less: undistributed earnings allocable to participating securities		-16,521	0
Add: adjustments to net income for dilutive securities allocable to: holders of preferred stock and unvested early exercised options and restricted stock		2,281	0
Common Stock [Member] | Restricted Stock and Early-exercised Options [Member]
Numerator [Abstract]
Less: undistributed earnings allocable to participating securities		-206	0
Add: adjustments to net income for dilutive securities allocable to: holders of preferred stock and unvested early exercised options and restricted stock		$28	$0

Net_Income_Loss_per_Share_Attr1

Net Income (Loss) per Share Attributable to Common Stockholders - Antidilutive Securities Excluded from Computation of Net Income per Share (Detail)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from the calculation of diluted shares outstanding (shares)	15,921	32,312	55,357
Series A Redeemable Convertible Preferred Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from the calculation of diluted shares outstanding (shares)	15,136	30,523	30,523
Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from the calculation of diluted shares outstanding (shares)	360	1,409	24,402
Restricted Stock Awards and Restricted Stock Units [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from the calculation of diluted shares outstanding (shares)	425	380	432

Financing_Arrangements_Detail

Financing Arrangements (Detail) (Syndicated Senior Secured Credit Facility [Member], USD $)	0 Months Ended		1 Months Ended
	Jul. 01, 2014	Dec. 21, 2012	Aug. 31, 2014	Dec. 31, 2013	Apr. 30, 2014
Line of Credit [Member]
Line of Credit Facility [Line Items]
Contractual principal prepayment obligation classified as a current liability				$48,500,000
Term Loan [Member]
Line of Credit Facility [Line Items]
Credit facility borrowing capacity		120,000,000
Debt term		3 years
Amount of debt instrument outstanding				114,000,000
Unamortized discount on debt instrument				400,000
Effective interest rate on debt instrument (percent)				3.79%
Repayment of debt	108,000,000
Interest expense	600,000
Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Credit facility borrowing capacity		50,000,000
Debt term		4 years
Amount of debt instrument outstanding				0
Interest expense			500,000
Credit facility borrowing capacity, terminated				20,000,000
Standby Letters of Credit [Member]
Line of Credit Facility [Line Items]
Credit facility borrowing capacity					20,000,000
6-month Adjusted LIBOR [Member] | Term Loan [Member]
Line of Credit Facility [Line Items]
Basis spread on variable contractual rate (percent)		2.50%
Line of Credit [Member]
Line of Credit Facility [Line Items]
Credit facility borrowing capacity		170,000,000
Net proceeds from issuance of debt		127,600,000
Debt issuance and lender costs		$2,400,000

Income_Taxes_Income_Before_Inc

Income Taxes - Income Before Income Tax (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Domestic	$114,937	$57,251	$38,714
Foreign	66,038	34,078	14,496
Income before income taxes	$180,975	$91,329	$53,210

Income_Taxes_Income_Tax_Expens

Income Taxes - Income Tax Expense (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Current:
Federal	$55,846	$28,856	$19,984
State	6,075	1,634	-493
Foreign	8,219	8,058	3,578
Total current	70,140	38,548	23,069
Deferred:
Federal	-13,551	-7,268	-2,247
State	-3,369	-861	126
Foreign	-333	332	0
Total deferred	-17,253	-7,797	-2,121
Income tax expense	$52,887	$30,751	$20,948

Income_Taxes_Income_Tax_Expens1

Income Taxes - Income Tax Expense Reconciles to Amount Computed by Applying Federal Statutory Rate (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Reconciliation to statutory rate:
Tax at federal statutory rate	$63,341	$31,965	$18,623
State taxes, net of federal benefit	4,911	2,344	1,384
Impact of foreign operations	-13,305	-113	-211
Stock-based compensation	8,050	2,982	1,385
Tax credits	-10,616	-5,637	-415
Other	506	-790	182
Income tax expense	$52,887	$30,751	$20,948
Reconciliation to statutory rate:
Tax at federal statutory rate	35.00%	35.00%	35.00%
State taxes, net of federal benefit	2.70%	2.60%	2.60%
Impact of foreign operations	-7.40%	-0.10%	-0.40%
Stock-based compensation	4.40%	3.30%	2.60%
Tax credits	-5.90%	-6.20%	-0.80%
Other	0.40%	-0.90%	0.40%
Effective Income Tax Rate Reconciliation, Percent, Total	29.20%	33.70%	39.40%

Income_Taxes_Significant_Compo

Income Taxes - Significant Components of Deferred Tax Assets and Liabilities (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Deferred tax assets:
Net operating loss carryforwards	$0	$252
Tax credit carryforwards	2,347	0
Stock-based compensation	9,950	3,475
Accruals and reserves	23,950	15,463
Total deferred tax assets	36,247	19,190
Deferred tax liabilities:
Depreciation and amortization	-3,418	-3,063
Intangible assets	0	-550
Total deferred tax liabilities	-3,418	-3,613
Net deferred tax assets	$32,829	$15,577

Income_Taxes_Reconciliation_of

Income Taxes - Reconciliation of Beginning and Ending Amount of Unrecognized Income Tax Benefits (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Gross balance at January 1	$9,898	$4,439	$966
Gross increase related to current year tax positions	6,401	5,280	3,473
Gross increase related to prior year tax positions	259	179	0
Gross unrecognized tax benefits	$16,558	$9,898	$4,439

Income_Taxes_Narrative_Detail

Income Taxes - Narrative (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Taxes Disclosure [Line Items]
Undistributed earnings of foreign subsidiaries	$96,200,000
Gross unrecognized tax benefits	16,558,000	9,898,000	4,439,000	966,000
Increase in unrecognized tax benefits	6,700,000
Unrecognized tax benefits (net of federal benefit), reduction of future income tax provision	15,500,000
Accrual for unrecognized tax benefits and interest	200,000	0	0
2014 Research Expenditures [Member]
Income Taxes Disclosure [Line Items]
Income tax benefit related to 2014 research expenditures	6,600,000
Domestic Tax Authority [Member]
Income Taxes Disclosure [Line Items]
Net operating loss carryforwards	400,000
State and Local Jurisdiction [Member]
Income Taxes Disclosure [Line Items]
Net operating loss carryforwards	10,100,000
Tax credit carryforwards	6,200,000
Adjustment to additional paid-in capital, realized tax credit carryforwards	$2,600,000

Related_Parties_Detail

Related Parties (Detail) (USD $)	12 Months Ended		3 Months Ended		1 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Jun. 30, 2013	Sep. 30, 2013	Jun. 30, 2014	31-May-14
				Device	Automobile
Company Affiliated with Investors [Member]
Related Party Transaction [Line Items]
Accounts payable associated with affiliated vendor	$100,000	$3,900,000
Company Affiliated with Investors [Member] | Related Party Transaction Engineering Services Agreement [Member]
Related Party Transaction [Line Items]
Payments made to affiliated vendor for services rendered	12,200,000
Company Affiliated with Investors [Member] | Related Party Transaction, Contract Manufacturing Agreement [Member]
Related Party Transaction [Line Items]
Payments made to affiliated vendor for services rendered		3,600,000
CEO's Family Member [Member] | Related Party Transaction, Settlement of Legal Matter [Member]
Related Party Transaction [Line Items]
Settlement amount for outstanding legal matter with CEO family member			200,000
Executive Officer [Member] | Related Party Transaction, Demand Payment Loan [Member]
Related Party Transaction [Line Items]
Loan amount to executive officer pursuant to demand payment loan			150,000
Son of Member of the Board [Member]
Related Party Transaction [Line Items]
Payments to be made to related party for naming rights				500,000
GoPro devices provided to related party at no cost				100
Naming rights agreement, period				3 years
Aggregate payments to related party for naming rights	300,000
CEO [Member] | Related Party Transaction Chartered Aircraft Expenses [Member]
Related Party Transaction [Line Items]
Payment to related party	500,000
Accrued amount related to chartered aircraft fees	400,000
CEO [Member] | Related Party Transaction Automobiles Purchased [Member]
Related Party Transaction [Line Items]
Number of automobiles purchased from the Company					7
Revenue from related party transaction					$300,000
Chief Financial Officer [Member]
Related Party Transaction [Line Items]
Shares repurchased from former CFO's estate (shares)						41,154
Shares repurchased from former CFO's estate (in US dollars per share						$18.40

Recovered_Sheet2

Commitments, Contingencies and Guarantees - Narrative (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Commitments and Contingencies Disclosure [Abstract]
Rent expense	$7,300,000	$3,900,000	$1,900,000
Warranty liability	6,025,000	3,691,000
Warranty liability recorded as element of long-term liabilities	$400,000

Recovered_Sheet3

Commitments, Contingencies and Guarantees - Schedule of Company's Contractual Commitments (Detail) (USD $)	Dec. 31, 2014
In Thousands, unless otherwise specified
Commitments and Contingencies Disclosure [Abstract]
Operating leases	$37,557
Operating leases: 1 year (fiscal 2015)	9,698
Operating leases: 2-3 years (fiscal 2016 and 2017)	18,644
Operating leases: 4-5 years (fiscal 2018 and 2019)	9,215
Operating leases: More than 5 years (beyond fiscal 2019)	0
Sponsorship commitments	13,858
Sponsorship commitments: 1 year (fiscal 2015)	8,743
Sponsorship commitments: 2-3 years (fiscal 2016 and 2017)	5,115
Sponsorship commitments: 4-5 years (fiscal 2018 and 2019)	0
Sponsorship commitments: More than 5 years (beyond fiscal 2019)	0
Other contractual commitments	7,395
Other contractual commitments: 1 year (fiscal 2015)	2,899
Other contractual commitments: 2-3 years (fiscal 2016 and 2017)	4,496
Other contractual commitments: 4-5 years (fiscal 2018 and 2019)	0
Other contractual commitments: More than 5 years (beyond fiscal 2019)	0
Capital equipment purchase commitments	16,021
Capital equipment purchase commitments: 1 year (fiscal 2015)	16,021
Capital equipment purchase commitments: 2-3 years (fiscal 2016 and 2017)	0
Capital equipment purchase commitments: 4-5 years (fiscal 2018 and 2019)	0
Capital equipment purchase commitments: More than 5 years (beyond fiscal 2019)	0
Total contractual cash obligations	74,831
Total contractual cash obligations: 1 year (fiscal 2015)	37,361
Total contractual cash obligations: 2-3 years (fiscal 2016 and 2017)	28,255
Total contractual cash obligations: 4-5 years (fiscal 2018 and 2019)	9,215
Total contractual cash obligations: More than 5 years (beyond fiscal 2019)	$0

Commitments_Contingencies_and_2

Commitments, Contingencies and Guarantees - Schedule of Product Warranty Liability Activity (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]
Beginning balances	$3,870	$1,937	$589
Charged to cost of revenue	10,268	7,380	2,821
Settlements of warranty claims	-7,733	-5,447	-1,473
Ending balances	$6,405	$3,870	$1,937

Employee_Retirement_Plan_Detai

Employee Retirement Plan (Detail)	12 Months Ended
	Dec. 31, 2014
Compensation and Retirement Disclosure [Abstract]
Minimum annual contributions per employee, percent	1.00%
Maximum annual contributions per employee, percent	86.00%
Employer matching contribution, percent	4.00%

Concentration_of_Risk_and_Segm

Concentration of Risk and Segment Information - Narrative (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
	Segment
Revenue, Major Customer [Line Items]
Number of operating segments	1
Accounts receivable sold during the period	$250,400,000	$71,100,000
Factoring fees	2,100,000	600,000
Revenue	1,394,205,000	985,737,000	526,016,000
Revenue [Member]
Revenue, Major Customer [Line Items]
Concentration risk, number of customers	1	1,000	1,000
United States [Member]
Revenue, Major Customer [Line Items]
Revenue	796,000,000	498,500,000	278,700,000
Formerly APAC to EMEA Region [Member]
Revenue, Major Customer [Line Items]
Revenue	19,300,000	10,600,000	3,600,000
Number of countries previously included in the APAC region	4
China [Member]
Revenue, Major Customer [Line Items]
Long-lived assets	$25,400,000	$6,000,000

Concentration_of_Risk_and_Segm1

Concentration of Risk and Segment Information - Schedule of Customer Concentration by Risk Factor (Detail) (Customer Concentration Risk [Member])	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Net Accounts Receivable [Member] | Customer A (Distributor) [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	17.00%	14.00%
Net Accounts Receivable [Member] | Customer B (Retailer) [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	14.00%
Net Accounts Receivable [Member] | Customer C (Retailer) [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	11.00%	11.00%
Net Accounts Receivable [Member] | Customer D (Retailer) [Member]
Concentration Risk [Line Items]
Concentration risk, percentage		21.00%
Revenue [Member] | Customer A (Retailer) [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	20.00%	17.00%	15.00%

Concentration_of_Risk_and_Segm2

Concentration of Risk and Segment Information - Schedule of Revenue by Geographic Segment (Details) (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Revenue, Major Customer [Line Items]
Revenue	$1,394,205	$985,737	$526,016
Americas [Member]
Revenue, Major Customer [Line Items]
Revenue	890,352	557,285	314,135
EMEA [Member]
Revenue, Major Customer [Line Items]
Revenue	371,197	322,226	161,193
Asia and Pacific area countries [Member]
Revenue, Major Customer [Line Items]
Revenue	$132,656	$106,226	$50,688

Acquisitions_Narrative_Detail

Acquisitions - Narrative (Detail) (General Things [Member], USD $)	0 Months Ended	12 Months Ended
In Millions, except Share data, unless otherwise specified	Oct. 18, 2013	Dec. 31, 2013
Business Acquisition [Line Items]
Percentage of acquisition interest	100.00%
Total consideration issued in the acquisition	$17
Cash paid	10
Equity interest issued, value	7
Shares issued	430,000
Compensation expense expected to be recognized over the requisite service periods	6.9
General and Administrative Expense [Member]
Business Acquisition [Line Items]
Acquisitions related cost		0.3
Portion of cash and common stock for which there is no remaining requisite service period [Member]
Business Acquisition [Line Items]
Total consideration issued in the acquisition	10.1
Retention Bonus Expense [Member]
Business Acquisition [Line Items]
Cash paid	$1.70
Unvested Stock Awards [Member]
Business Acquisition [Line Items]
Shares issued	322,500

Acquisitions_Purchase_Price_Al

Acquisitions - Purchase Price Allocation and Useful Life of Acquired Assets (Detail) (USD $)	0 Months Ended
In Thousands, unless otherwise specified	Oct. 18, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Business Combination, Separately Recognized Transactions [Line Items]
Goodwill (non-tax deductible)		$14,095	$14,095	$4,233
General Things [Member]
Business Combination, Separately Recognized Transactions [Line Items]
Goodwill (non-tax deductible)	9,862
Other assets and liabilities acquired, net of cash	84
Total assets acquired	10,107
General Things [Member] | Noncompete Agreements [Member]
Business Combination, Separately Recognized Transactions [Line Items]
Estimated useful life (in years)	2 years
Intangible assets other than goodwill	$161